Same problem here :
Everything looks fine, connection tests are OK. GWEBcache queries are OK. Endless attempts to connect. No hosts in cache and absolutely no connection. Tried everything found in this forum.
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Except for connection tests, Wireshark doesn't shows any incoming packet.
My ISP is Orange (France) . Are they blocking Shareaza ? I don't have any Orange crapware installed, AFAK.
Shareaza 2.3 used to work well but I didn't use it for a while. (I've had that no-connection experience with 2.4, on another computer)
Having now no-connection with 2.3 either, I decided to upgrade and... here I am. (On the verge on giving up with gnutella.)