error code 94030?

when im playing mario kart online and all of the sudden it freezes and gives me the error code 94030, so i look it up on the nintendo site and it says it is caused by wireless interuption or something. and was this caused by a red battery and someone playing WOW on a wireless laptop in our house or what?

Wireless interruption could be a number of things. Depending on how close you were to your router, you could have briefly lost connection. It's possible, if a number of other devices were simultaneously accessing the router, that there could have been interference. Low battery could also cause your wireless connection to become flakier. Has this happened more than once?

Edit: Okay, did a quick Google search (my preferred method of troubleshooting) and it turns out that 94030 is a somewhat common error around the debut of Nintendo WFC. Seems the most common fix is to limit the router's transfer speed to 2 Mb/s.