Unfortunately versions of BearShare after version 6 do not run on the Gnutella network. Files are downloaded for free on the Gnutella network, no need to pay for them. It's a mutual file sharing network. We all share files with each other. The mutual file-sharing is how we find & swap files. All files on Gnutella network are files shared by users like me & you.

Whereas the version of BearShare you have at moment runs on a commercial network where you need to pay for what you download. Not really much different to going to a music pay-site. Difference being lower quality of music files on the commercial network BearShare versions 6-8 use. I presume you are using BearShare version 8.