I believe you're using the wrong drivers. I own a Linksys WMP11 card, and I am fairly sure it's the 2.7 version. Mine has a BCM4303 chipset. (lspci | grep -i broadcom) Not to worry, there is hope for these cards in linux! In fact, they work quite well. I hope that your card is the same version as mine.
You'll need to use a small package called ndiswrapper. It allows you to use a windows wlan driver in linux. You'll also need the latest windows drivers for your card, and probably a set of kernel sources and headers.
http://ndiswrapper.sourceforge.net/
The docs supplied with it should be sufficient, it's pretty easy to figure out. So I'll leave the rest up to you.
If you just want to check to see if your wireless card is showing up, type "iwconfig" and see if it brings up a "wlan0."