D-Link DWL-G510 can't locate firmware?

I am trying to get a D-Link DWL-G510 card working under SuSE 10.2 
(kernel 2.6.18.2-34).  lspci identifies the NIC as "RaLink RT2561/RT61 
rev B 802.11g".

I have installed driverloader and the windows driver but am having 
problems.  There are various errors in the system log, but the first is 
this:

driverloader: NdisOpenFile: filename=rt2561.bin failed (err=-2)
wlan0: WPA, WPA2, AES, TKIP, WEP128, WEP64 supported
wlan0: IEEE 802.11g Wireless Card. at 0000:00:0e.0 (MAC address 
00:19:5B:2D:AE:41) ready
wlan0: New link status: Disconnected (0002)
 
I have rt2561.bin in my /lib/firmware directory, but it seems this is 
not the correct place.  I am a linux newbie and am hoping more 
experienced folks will know how to help.

Martin