I'm getting an error message of " ERROR > 401: No such nick/channel:", followed by the IP of whoever's trying to get the file from me. Annoying thing is, I can SEE them in the channel listings.
Apparently, they're not seeing the transfer attempt at all, while having the correct ports enabled, etc.
I'd guess it was some kind of a firewall or router issue, except that people behind both can get files from me without a problem.
Any guesses or help on how to fix this?