I just editted tpl_header.php just to add my link to zen cart logo.

Now the page disappeared like this

http://product4you.myownfreeweb.com/zen/index.php

I also editted stylesheet.css but just edit the header_bg height.

I checked the sql database and it's normal.

My affiliates page works ok. http://product4you.myownfreeweb.com/affiliates

What do you think is the problem and what files/folders should I check now?

Please help.

Thanks.