Theres a router involved there or a NAT, its translating the port number, it detects the dcc send , and adjusts it to the higher port number (normally 60,000+) only ptoblem is on a resume that portnumber is sent rather than the true one a resume is ment to send, aka the sender ignores the resume request. When i was working on it i found no way around the problem, i do believe they may have fixed it later with a router bios upgrade (thats speculation tho)