The client and the DCC protocol are not made for that kind of heavy usage.
That's a load of bs. It may not have been designed for it, of course not, it's an IRC client, it handles it just fine nonetheless.Newb69
I had a linksys modem once that would do the same thing, regardless of what program I was using, if I downloaded too fast, the link on my side of the modem would be broken and I would have to restart the modem. Unfortunately there was no firmware fix for the modem and I had to replace it. If you have to do the same to fix your connection, then it's worth a google search of your modem brand and model to see if others are experiencing the same. Also, you may want to check if there are any driver updates for your network adapter, this actually sounds like it may be your problem.