That device is known to be a "doubtfull" device, meaning that it is not guarenteed to be either rt2500usb or rt73usb.
If rt2500usb fails, then try rt73usb.
Thx for your advice.
But is there any explanation for the thing i described?
works with 2.6.22 and rt2x00 2.0.4
but does not work with 2.6.24 and rt2x00 2.0.10...
Well tons of patches between the 2 versions are the cause.
You could try the wireless-compat package from linuxwireless.org and see if rt2x00 2.1.4 and a more recent mac80211 will work for you