You can find a direct link for FrostWire beta from here http://www.gnutellaforums.com/showthread.php?t=63998
Keep in mind this is a beta & as I said above, it's lacking the filter options.

Thanks again, I'll give it a try. and get back to you. Just in case, if this doesn't still let me connect, what should I try?

The instructions et Voila left about changing the details in that particular file.
Otherwise, post the following details; System details - help us to help you (click on link)