Alex??? I can not get a real order to go through the order form. Below is the error message I get from URL: https://secure.authorize.net/gateway/transact.dll Here is what I've done Default Relay Response URL I've used both the http://www.baseball-injury-report.com/amember/plugins/payment/authorize/ipn.php that my CP tells me to use and without it. the MD5 hash Its the same in my authorize.net settings and in the CP. I'm looking at the same hash. (I even tried 3 new ones but it still doesn't work) Transaction Key: I've reset this three different times and made sure I was using the most current and ONLY active one. I talked to my bank/authorize.net and they say its in my software. https://secure.authorize.net/gateway/transact.dll (this URL produced this error message) authorize ERROR: MD5 hash incorrect (Details: PNREF:1337187829, invoice:761) x_response_code => 1 x_response_subcode => 1 x_response_reason_code => 1 x_response_reason_text => This transaction has been approved. x_auth_code => 064772 x_avs_code => Y x_trans_id => 1337187829 x_invoice_num => 761 x_description => The Baseball Injury Report 2007 Annual x_amount => 19.45 x_method => CC x_type => auth_capture x_cust_id => 752 x_first_name => eric x_last_name => wilton x_company => x_address => 65** parkway cir x_city => racine x_state => wi x_zip => 53406 x_country => us x_phone => 262-634-**** x_fax => x_email => kllws55 AT yahoo.com(I chnaged the @ to AT) x_ship_to_first_name => x_ship_to_last_name => x_ship_to_company => x_ship_to_address => x_ship_to_city => x_ship_to_state => x_ship_to_zip => x_ship_to_country => x_tax => 0.0000 x_duty => 0.0000 x_freight => 0.0000 x_tax_exempt => FALSE x_po_num => x_MD5_Hash => 06B808F8C60FFAF7C40578A2A7410B9A x_cavv_response =>