Not every connection succeeds if you get 'Gnutella 0.6 connection rejected.', then the other host is already full of other connections in this case the host sends you more IP's just let Phex go through the connections for some time and it will find connections.
If you have a low bandwidth connection 2 or 3 Ultrapeer connections should be already fine for you.
If you have a fast connection like DSL where you can use a lot of bandwidth then go to the network options and say you like to Force Ultrapeer.

Gregor

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