in reply to Can't locate loadable object for module in @INC

Language::Prolog::Yaswi::Low is not purely Perl code. If you have a full compiler setup on Windows you can try the standard install process:
> perl Makefile.PL > make > make test > make install
Otherwise, you'll have to find a packaged version for Windows. If you're using Activestate Perl, first try:
> ppm install Language::Prolog::Yaswi
If Language::Prolog::Yaswi::Low is not in Activestate's repository, try the UWinnipeg, bribes.org, or trouchelle repositories.