I installed Zen cart and it was working fine, apart from i couldnt upload images, this was due to open_base restrictions when using PHP. Following my hosts advice i installed a tmp directory and a new customised PHP setting: drop down box select upload_tmp_dir. Now i can upload mages fine. The only structural changes i made were to install a custom template and to add the column product listing from the zen cart addons. Now when i click any links on the site, the url in the address bar wont change? it is very strange, has anyone heard of anything like this or have any idea what it could be?

Im baffled!