Are you trying to connect from home? Trying to connect from a dorm or work connection won't work because they very frequently use firewalls to block p2p.
If you're at home, try contacting your ISP and asking them what the deal is between them and p2p: are they blocking it, blah blah blah?

Oh, forgot to ask: what is your exact problem? No connection? Low connection status? No dlds/uploads?

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iMac G4 OSX 10.3.9
RAM 256MB
LW 4.10.5 Basic
ADSL anything from 3 to 8Mbps/around 1024kbps

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