You got any problems? Maybe you'll find an answer to your problem here.
If your documents are ok (at least at the master's side), leave the session, disconnect from the IRC server (/disconnect) and restart/rejoin for a new session. This should normally solve any problems with a wrong/inconsistent write access list or similar problems.
This might be a problem with the DCC and a firewall. Check if your firewall supports the IRC/DCC protocol.
Change the settings for the IRC Flood-Kickout Protection (Section , “Flood-Kickout Protection”). Try and lower the bytes per interval, or raise the interval time. Ignore the maximum number of lines value for now.