Thanks for the link to that thread slabadoo, changing the HTTP_POST_VARS with _POST worked for me. I suppose I didnt see that thread because I wasn't searching in the right place "Contributed Add-ons"

Anyways, thanks again.

And good luck to you Yellowleaf, I dont know much about php myself, but very pleased with the zen-cart community. I am using the 1.3.7 zen-cart, and not 1.3.5 when I changed the http_post_vars to _post. maybe silly question, but did you leave the '$' in front of the '_post' to read '$_POST' ?