[phplib template] file does not exist

Hi, i'm having a problem. I just installed a webserver with mysql and php. I copied my files that i had stored on another webserver to my new. I didn't change anything to these files and the files worked fine on the other server. Now in this server i get this error with a template: Template Error: filename: file ./templates/nav_left_body.tpl.php does not exist. Halted But that file does exist. I can see it through ftp an i can get to it via http browser. What could be wrong? Could it be a config failure in my php.ini? Or in httpd.conf? In case it is the config, what could it be? Thanks in advance!!