The problem is (for 90% sure) that you have a router or firewall which blocks the traffic of the DC++ program and the hub-server.
You can do 2 things:
unblock your firewall specific for the DC++ program (more info how to do: http://www.dslreports.com/faq/dc
the other thing is to loggin in passive mode (instead of active mode)
You will see that you can download from other queenfans after logging in again.