PERL exec or system commands

I am using an apache web server on a linux OS.
I want to use the perl exec or system command to either call another html file or to call a real audio video file.

while I can use
exec(`ls>fileb` ); to place a directory listing in a text file, Iam unable to call an html page or a real audio file
what am I missing and what command syntax should I use to successfully call an html page or a real audio file

your answer must work to recieve points !