I'm getting real problems trying to get DC++ working on both my laptop and pc

When trying to connect to the two default hubs I get the error:

Download failed: The requested address is not valid in it's context

How can that be with the built in hubs?

I've disabled all firewalls on the machines (windows and Zonealarm) and have set up port forwarding on my Linksys router. I've even tried passive mode and still get the same.

Suggestions folks?