Why can't I run .cgi but .pl ??
 

I had upload my cgi file to my new host but that file (myfile.cgi) can't run and after I change its name to myfile.pl it works ! Anyone here know why ? It's strange because that file works on my precedent host. Thanks in advance.

It has to do with the way each server is configured.

Your host probably only has this line in their httpd conf file

"AddHandler cgi-script .pl"
To execute .cgi exstentions you need this line as well "AddHandler cgi-script .cgi" If you are on a dedicated you can add that your self. Else you have to contact you host and ask If they can do it