Gaming WiFi for DVD-5 Brawl?

[PlooBloo]

I'm not sure if this has been addressed or not, but I'm currently playing the DVD-5 version of Brawl and every time I wait for someone to join me in WiFi, it crashes. It gives me the disc could not be read message (the green one). Does this just not work or is it just me? Btw, I have a WiiKey. Thanks.

EDIT
Ah, only friend multiplayer works. Time to get friend codes! xD