ipw2200 problem

Hi!
I'm having problems using this adapter Intel Corporation PRO/Wireless 2915ABG [Calexico2] with backtrack 5. After I

dmesg | grep error

 the only error message I get is this:
[   38.771895] ipw2200: probe of 0000:03:03.0 failed with error -5

From:
dmesg | grep ipw2200
[   38.628681] ipw2200: Intel(R) PRO/Wireless 2200/2915 Network Driver, 1.2.2kmprq
[   38.628687] ipw2200: Copyright(c) 2003-2006 Intel Corporation
[   38.628802] ipw2200 0000:03:03.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17
[   38.628832] ipw2200: Detected Intel PRO/Wireless 2915ABG Network Connection
[   38.771793] ipw2200: ipw2200-bss.fw request_firmware failed: Reason -2
[   38.771800] ipw2200: Unable to load firmware: -2
[   38.771804] ipw2200: failed to register network device
[   38.771846] ipw2200 0000:03:03.0: PCI INT A disabled
[   38.771895] ipw2200: probe of 0000:03:03.0 failed with error -5

I searched the web, but no help there.... Any idea?

regards
Alex