Firstly, this probably doesn't belong in this section. Secondly, the ActivePerl installer from ActiveState should have done all of this for you. Did you install Perl in some strange way?

You may have better luck checking the support section of ActiveState's web site for installation issues. You may just have to edit your autoexec.bat (or change the Environment section under My Computer/Properties) to add the Perl bin directory to your PATH. But if that's missing, chances are other parts of your Perl installation may not be done correctly. I suggest you go with the recommended installation procedures documented on ActiveState's web site. If you did, and are getting this error, perhaps this is a bug in the ActiveState installation. Either way, I'd check their support site.

Hope this helps.