Just start by tackling the first error message, which is

Can't locate Crypt/Random/Source/Strong.pm in @INC (@INC contains: ). 
+at /<C:\Documents and Settings\Windows Xp\Desktop\pwgen.exe>Class/MOP
+.pm line 135
[download]

You are missing the package Crypt::Random::Source::Strong, which in this case you'll find in PPM in the module Crypt-Random-Source, so typing in cmd.exe the following command should fix that problem:

ppm install Crypt-Random-Source
[download]

Now, try the Perl script again, and look at the first error message again. Another missing module? Install that as well and keep going until you either have a different problem you can't solve (click reply on this post so i get notified) or the script works.

Before i forget, you did read this

**********************************************************************
+******
* WARNING: Applications generated by this evaluation copy of PerlApp w
+ill  *
*          stop working after the end of the evaluation period: 2012-0
+1-29 *
**********************************************************************
+******
[download]

in the output, didn't you. What you have is an evaluation product of a commercial software. So, after you got your script working, you'll have to decide if you want to buy the product or switch to something like Strawberry Perl and PAR.