Ok, I used oscommerce for many years, then found zencart. I love it. I have set up 3 other sites using this version V154. All the other sites work fine with paypal payments standard.

Now I have decided to migrate my main store from oscommerce to zencart. Using version 154. I have the new store in a sub directory of my main store. All works great except the payment. Like I said, I am using paypal payments standard on the other sites and they working fine. With this main store the orders are not being recorded in admin. I get notification from paypal, but thats it. Also after the checkout and payment at paypal I get a screen from paypal with the confirmation, but on my other sites it will go back to the stores checkout success page. I click on the paypal site to return to the store and when I do I get a white screen with this: WARNING: An Error occurred, please refresh the page and try again. I refresh the page and am taken to the checkout success page.

When I check orders in admin, I have no orders and the same warning just below the legend and above the column names: WARNING: An Error occurred, please refresh the page and try again.

I know everyone says not to use paypal payments standard, but the flow works great with my site and it is working on all my other sites.

Thanks for any and all help.