I am using a dummy paypal account to test payplan and everytime i make a payment I get a thank you page but the status on Invoice-CheckOut and not paid. I checked both the dummy paypal account and it shows paid, I go to the merchant paypal and i see the money.

Edited: I tried the https://stackideas.com/forums/error-log-generated-with-message-invalid-ipn#reply-381988 and it did work