I have tried to use the Wlan RaLink RT2561/RT61 on Knoppix 5.2 witout success.
MSI Megabook L720 BS
Model No MS-1047

lspci -v
03:09.0 Network controller: RaLink RT2561/RT61 rev B 802.11g
Subsystem: Micro-Star International Co., Ltd. Unknown device b833
Flags: bus master, slow devsel, latency 64, IRQ 21
Memory at fbff0000 (32-bit, non-prefetchable) [size=32K]
Capabilities: [40] Power Management version 2


lsmod
rt61pci 40836 0
80211 170372 2 rc80211_simple,rt61pci
rt2x00debug 10632 1 rt61pci
eeprom_93cx6 7424 1 rt61pci
crc_itu_t 6272 1 rt61pci
firmware_class 14208 2 rt61pci,pcmcia

ndiswrapper -i /cdrom/KNOPPIX/rt61.inf

If I try to load the device (ifconfig wlan0 up) I get an error that there is no such device present.
Has someone got the same problem?