uhm I have the same problem, but in my case I am trying to run glftpd 2 on port 9090.
I tried to manually add the port to firewalls configuration, and now I get some response from server:
[L] Connecting to lappy
[L] Connecting to 192.168.0.244:9090
[L] Connection Reset by Peer(10054)
[L] Retrying after 5 seconds for lappy
[L] lappy disconnected
I tried exactly the way Gay R0b0t told to do, and I saw in expert the port 9090 already added on tcp.. for anycase I added it on udp but no luck..
I also noted something strange: under /etc/services I have something called websm on port 9090 and both tcp and udp.. maybe thats the reason it doesn't work? what is this websm anyway?