I have checked a file
cvs rename temp.pl temp
You cannot rename in CVS. You should do:
cp temp.pl temp cvs add temp cvs rm -f temp.pl
But you will lose file history. If you have file-level write access to the CVS repository, you can find file temp.pl,v there and rename it to temp,v - this will keep history.
CVS is inherently file-based (based on RCS), so cross-file operations are not supported.