Then use the included linux driver?! BUT add the firmware.
But I think at the best, you will get WPA but not 54g (only 11g) but it evoluates so quickly in the kernel that I'm not sure.. (there are plans for a new wireless kernel stack but its a complex work)
Probably this line
Mode:Managed Access Point: Invalid
tells you something is wrong (Invalid).
On my card, the display is like this:
eth1 unassociated ESSID:off/any
Mode:Managed Channel=0 Access Point: Not-Associated
Bit Rate:0 kb/s Tx-Power=20 dBm Sensitivity=8/0
Retry limit:7 RTS thr:off Fragment thr:off
Link Quality:0 Signal level:0 Noise level:0
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0
If tx-power is not Off, then the card is working.