Paypal returning to login/regist page

[shartlesville]

I have the same problem too. Zen-cart had no problem transferring data to PayPal and the customer proceeded to PayPal page, however, after he clicked the "Pay Now" button on PayPal, he was returned to the login page of my website, instead of having the transaction processed.

The order was not processed by zen-cart, he was not charged in PayPal either.

I spent a day trying to reproduce the error but have no luck at all.

Not sure if anybody has ever bumped into such problem.

I have been dealing with this but instead of looping to the login, it loops back to the shopping cart and the customer is totally confused (I know I was!).

In order to complete the transaction after they go to PayPal, login, and click 'continue', they come back to my checkout page where they have to tick the terms box AGAIN and click the Confirm the Order button AGAIN and then it processes the order and the payment.

I added a lot of text to hopefully direct them without confusing the issue - I hope.

I am using the FEC mod and one page checkout. Payment modules installed are PayPal EC, QBMS, Check/MO, freecharger - all others not installed (red lights).

All help is appreciated!

Blessings
Krisann