'C:/Perl64/bin/' is not recognized as an internal or external command, operable program or batch file

I installed active perl on my win2k12 server, I want to run a perl script but it showing this message, 'C:/Perl64/bin/' is not recognized as an inteal or exteal command, operable program or batch file. I change environment variable path like C:Perlbin,C:Perlsitebin,C:Perl64bin. but what ever path i changed same path is not recognised as an inteal or exteal command.