I moved from MAMP to 1and1 hosted server, the store is working no error messages but....
1) add to cart doesn't work, the AJAX is working but the cart remains empty.
2) can't register new accounts.
3) cant add review (which i assume to have something to do with accounts).
4) doesnt send email when new user is created.
that's what I have found so far(I hope that there aren't anymore

Opencart v1.4.9.4
store link : http://highresdesign.com/Greaterplumbin ... ommon/home
theme by :http://hostandwin.com pcstore theme
extensions added :Q&A
please any help and guidance will be "greatly" appreciated .
tnx