You're obviously connecting but not with any amount of hosts.
I don't tend to use the Community connections b/c I get good result without that but...
I just went on LimeWire to test it:-
I just connected to North America and got 208 hosts in 30 secs.
Its a little confusing using Communities.
I select say- N America - click connect
The Connect (Red Light) button sometimes comes on as if your disconnected. But if you wait a little while it connects and says Requesting Group Members from then on the hosts should start to rise.
If the Connect button stays red - hit it again to connect.
If you tried this and still not working - come back on and post again on ths thread.
Also there is some help on the FAQ on Connection Problems..
LimeWire Troubleshooting FAQ
Good Luck