createlang plperl

Hello,

I'm running cygwin 1.2.21, postgresql 7.3.2 on Windows XP and was
trying to add plperl to my databases with

> createlang plperl template1

I got this error message:
ERROR:  Load of file /usr/lib/postgresql/plperl.dll failed: dlopen:
Win32 error 126
createlang: language installation failed

I was able to add plpgsql and plpython with the above command
without any problems. Can anyone tell me if it's a problem with the file
or if I'm doing something wrong. I've just installed this recently and
everything else seems to be working fine so far. I wasn't sure if this is
a cygwin, Windows, or postgresql problem. Thanks for any help.

Cheers,
Jennifer