Hi. I've been trying to set up aMember with PayPal and I find myself stuck. Everything works fine - signup, redirect to PayPal, PayPal signup/login. Where things get stuck is when I try to actually make the payment. When I click the Pay button I get logged out of my PayPal account and get this message... ""The link you have used to enter the PayPal system is invalid. Please review the link and try again."" Been trying to fix this for much of the night - no idea where to turn. Migh be helpful to state that I'm using PayPal's Sandbox. Thanks Larmir