You have the 802.11 G? You are in a very bad spot, as it is. http://www.hpl.hp.com/personal/Jean_Tourrilhes/Linux/

There is limited [if any] support for anything but the B revision right now under Linux. Can't your card change modes? [I hope you didn't buy a card that's only G, because that standard is poorly supported anyway in terms of connectivity. Yes, it's faster, but where are you going to use it?]