To all those who is having problems adding products to cart...If you click add product to cart and it shows it but when you go to cart and it's not there read on...
Itis all about your PHP. To be precise change your php from suphp to mod_php and you will be fine. I have switched the hosts( I use VPS) and set the php to run as suphp and everything was working fine BUT woocommerse. Took a while but I changed php to mod_php and all is peachy.
Some here in the thread reported contacting support of your hosting...It will work as well. I am using Kloxo to host my sites so it was just a matter of switching server program.
Cheers!