A erreur in payment

Hello, i have this error for a payment and the product is a simple paymement and i validate the payement in admin, is appear a recurent

15/01/12 11:54
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31.36.56.5 Existing payments count [1] exceeds number of allowed rebills [0]+1, could not add new payment
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/amember/payment/plimus2/ipn?montant=9700&ref=H6YBZ&prix=9700&r=1948&pr=9700&o=3748&ret=http://www.musite.com/amember



Exception Am_Exception_Paysystem
Invoice->addPaymentWithoutAccessPeriod [ application/default/models/Invoice.php : 941 ]
Invoice->addPayment [ application/default/plugins/payment/plimus2.php : 133 ]
Am_Paysystem_Transaction_Plimus2->processValidated [ library/Am/Paysystem/Transaction/Abstract.php : 46 ]
Am_Paysystem_Transaction_Abstract->process [ library/Am/Paysystem/Transaction/Incoming.php : 222 ]
Am_Paysystem_Transaction_Incoming->process [ library/Am/Paysystem/Abstract.php : 442 ]
Am_Paysystem_Abstract->directAction [ application/default/controllers/DirectController.php : 35 ]
DirectController->__call [ library/Am/Controller.php : 118 ]
Am_Controller->dispatch [ library/Zend/Controller/Dispatcher/Standard.php : 295 ]
Zend_Controller_Dispatcher_Standard->dispatch [ library/Zend/Controller/Front.php : 954 ]
Zend_Controller_Front->dispatch [ library/Am/App.php : 1372 ]
Am_App->run [ index.php : 41 ]

Plimus 2, is a plugin for my payement.

<?php

class Am_Paysystem_Plimus2 extends Am_Paysystem_Abstract {
const PLUGIN_STATUS = self::STATUS_DEV;
const PLUGIN_REVISION = '0.1';
protected $defaultTitle = 'Paybox2';
protected $defaultDescription = 'Carte bancaire sécurisée Paybox';
const URL = "http://www.infoconcours.com/cgi-bin/modulev2.cgi";
const TESTING_URL = "http://www.infoconcours.com/cgi-bin/modulev2.cgi";
const MODE_LIVE = 'live';
const MODE_SANDBOX = 'sandbox';
const MODE_TEST = 'test';

public function _initSetupForm(Am_Form_Setup $form) {
$s = $form->addSelect("testing")
->setLabel("test Mode Enabled");
$s->addOption("Live account", self::MODE_LIVE);
$s->addOption("Sandbox account", self::MODE_SANDBOX);
// $s->addOption("Account in test mode", self::MODE_TEST);
}

public function getSupportedCurrencies()
{
return array(
'EUR');
}

public function init()
{
parent::init();
$this->getDi()->billingPlanTable->customFields()
->add(new Am_CustomFieldText('plimus_contract_id', "Nombre de paiement 1 pour 1 fois, et 3 pour Fois",
"(les autres ne sont pas progammés, mais à voir pour mettre 2 fois par exemple"));
}
public function _process(Invoice $invoice, Am_Request $request, Am_Paysystem_Result $result)
{
$a = new Am_Paysystem_Action_Redirect((($this->getConfig('testing')==self::MODE_SANDBOX) ? self::TESTING_URL : self::URL));
$a->contract_id = $invoice->getItem(0)->getBillingPlanData("plimus_contract_id");
$a->custom1 = $invoice->public_id;
$a->member_id = $invoice->user_id;
$a->invoice_id = $invoice->invoice_id;



if ($a->contract_id > 1){
$a->PBX_CMD = "custom1=$a->custom1&div=PBX_2MONT0000000000PBX_NBPAIE02PBX_FREQ01PBX_QUAND00&prix=$invoice->first_total&r=$a->member_id&pr=$invoice->first_total&o=$a->invoice_id&ret=http://www.infoconcours.com/amember&nom=$a->Nom";
$invoice->first_total = ($invoice->first_total*100);

}else {
$invoice->first_total=$invoice->first_total*100;
$a->PBX_CMD = "custom1=$a->custom1&prix=$invoice->first_total&r=$a->member_id&pr=$invoice->first_total&o=$a->invoice_id&ret=http://www.infoconcours.com/amember&nom=$a->Nom";

}

$o = $invoice->invoice_id;

$a->currency = $this->getCurrencyCode();
$a->Nom= $invoice->getFirstName();
$a->Prenom = $invoice->getLastName();
$a->PBX_PORTEUR = $invoice->getEmail();
$a->PBX_MODE = "1";
$a->PBX_SITE = "5864408";
$a->PBX_RANG = "01";
$a->PBX_IDENTIFIANT = "58644081";
$a->PBX_TOTAL = $invoice->first_total;
$a->PBX_WAIT = "0";
$a->PBX_DEVISE = "978";
$a->PBX_RETOUR = "montant:M;ref:R;auto:A;trans:T;numabo:B,datefin";
$a->PBX_EFFECTUE = "http://www.infoconcours.com/amember/payment/plimus2/ipn";
$a->PBX_REFUSE = "http://www.infoconcours.com/amember/content/p/id/3/";
$a->PBX_ANNULE = "http://www.infoconcours.com/amember/signup";
$a->filterEmpty();
$result->setAction($a);
}


public function createTransaction(Am_Request $request, Zend_Controller_Response_Http $response, array $invokeArgs) {
return new Am_Paysystem_Transaction_Plimus2($this, $request, $response, $invokeArgs);

}


function getCurrencyCode()
{
return strtoupper($this->invoice->currency);
}
// let aMember know how this plugin is going to deal with recurring payments
public function getRecurringType()
{
return self::REPORTS_EOT;
}


function getReadme(){
return <<<CUT
Ici le texte pour décrire l'explication de paiement
CUT;
}
}

class Am_Paysystem_Transaction_Plimus2 extends Am_Paysystem_Transaction_Incoming{

public function findInvoiceId(){
return $this->request->getFiltered('r');

}
public function getUniqId() {
return $this->request->get("o");


}

public function validateSource() {
// there must be some code to validate if IPN came from payment system, and not from a "hacker"
return true;
}

public function validateStatus() {
// there must be code to check post variables and confirm that the post indicates successful payment transaction
return true;
}

public function validateTerms() {
// compare our invoice payment settings, and what payment system handled
// if there is difference, it is possible that redirect url was modified
// before payment
//$invoice->first_total=$invoice->first_total*100;
//return ($this->request->get('montant') == $this->invoice->first_total);
return true;
}

public function processValidated() {
$this->invoice->addPayment($this);
Am_Controller::redirectLocation($this->request->get("ret"));
}


}
?>

/amember/payment/plimus2/ipn?montant=9700&ref=custom1=WDU1R&prix=9700&r=1344&pr=9700&o=3765&ret=http://www.infoconcours.com/amember&nom=&auto=600642&trans=353233346&numabo:B,datefin=1306

Exception Am_Exception_Paysystem
Invoice->addPaymentWithoutAccessPeriod [ application/default/models/Invoice.php : 941 ]
Invoice->addPayment [ application/default/plugins/payment/plimus2.php : 134 ]
Am_Paysystem_Transaction_Plimus2->processValidated [ library/Am/Paysystem/Transaction/Abstract.php : 46 ]
Am_Paysystem_Transaction_Abstract->process [ library/Am/Paysystem/Transaction/Incoming.php : 222 ]
Am_Paysystem_Transaction_Incoming->process [ library/Am/Paysystem/Abstract.php : 442 ]
Am_Paysystem_Abstract->directAction [ application/default/controllers/DirectController.php : 35 ]
DirectController->__call [ library/Am/Controller.php : 118 ]
Am_Controller->dispatch [ library/Zend/Controller/Dispatcher/Standard.php : 295 ]
Zend_Controller_Dispatcher_Standard->dispatch [ library/Zend/Controller/Front.php : 954 ]
Zend_Controller_Front->dispatch [ library/Am/App.php : 1372 ]
Am_App->run [ index.php : 41 ]

This ?

1.0 VALUE 3765 1344 plimus2 EUR 81.51 0.00 15.49 0.00 97.00 1y 0 0.00 0.00 0.00 0.00 0.00 19.00 0 WDU1R WBBwEYfB58Y4i460 2012-01-17 11:59:34 2012-01-17 12:00:46 1.000000 3771 3765 103 product Site infoconcours acc&eacute;s complet aux concours Tout le site Infoconcours,mais SANS le journal. 1 81.51 0.00 15.49 97.00 0.00 1y 0 0.00 0.00 0.00 0.00 EUR 0 2 0 0 122 a:2:{s:9:"paypal_nb";s:1:"1";s:18:"plimus_contract_id";s:1:"1";}

Ok aleander. I post the helpdesk