Looking from the documentation for Net::Telnet, you can't use fhopen to open a file. You need to have the file open prior to using fhopen.

fhopen - use already open filehandle for I/O 

    $ok = $obj->fhopen($fh);


This method associates the open filehandle $fh with $obj for further I
+/O. Filehandle $fh must already be opened. 
Suppose you want to use the features of this module to do I/O to somet
+hing other than a TCP port, for example STDIN or a filehandle opened 
+to read from a process. Instead of opening the object for I/O to a TC
+P port by using open() or new(), call this method instead.
[download]

Update:Check this one site out..

- Moon