Serious lag spikes in Icecrown going on for days now.

It has been happening a lot lately with no explanation given. Everything else using my internet connection is working flawlessly except when I play on that server.

On top of that, the server randomly reverses a few steps back when I'm walking or riding on a mount. This is infuriating and I'm seriously considering quitting Warmane (or at least Icecrown if it's just that realm) altogether because of this.

The problems I speak of happens no matter what time of day it is.

EDIT: This is going to sound really weird, but using a wireless mouse and a 2.4ghz wifi connection at the same time seems to cause the problem. However, after using a wired connection, there are no more problems. Can a mod explain this to me?