What buiild of Strawberry Perl are you using? Also, are you using the 32-bit or the 64-bit version?

I just took a quick look at the release notes for the 32-bit and 64-bit versions of their latest build. The 32-bit version comes with Math::Pari already installed. Both 32-bit and 64-bit versions come with Net::SSH2 installed. Can you use Net::SSH2 instead of Net::SSH:W32Perl? If so, you probably already have it installed since you're using Strawberry Perl.