437391 paypal/ipn guru

Hello, The last 3 days payments made on my website with paypal are not working anymore. There is nothing changed, so dunno where the problem resides. Paypal is slow answering to questions, so i need some one that can test and see if the problem has to do with my script or if its a paypal problem. In short: User makes a subscription payment -> user pays -> payment is succesfull -> IPN does the work and put user is the right group -> Recieve email from paypal that payment is done to me. Now: User makes a subscription payment -> user pays -> user gets error after clicking pay now -> the payment is done -> IPN does nothing, -> Don't get a email from paypal -> the payment is NOT a subscription. The error users get is: We are sorry, we are experiencing temporary difficulties. Please try again later. If this error occurred while making a payment, avoid duplicate payments by checking your Account Overview before resending a payment.