Normally the wallet gets an initial list of nodes from the seed nodes coded in. From there it requests the neighbor nodes, once it has a connection running. You can try to add Those are p2pool nodes, which have to run a wallet. Also every pool should have a waller running and is a possible neighbor. Additionally, how long did you wait for connections? It may take 10 -20 minutes worst case to find additional nodes. The debug.log file should give information, if your node gets a list of nodes and if it can connect to some of them