wlan1 Interface doesn't support scanning : Network is down
Apparently it was me who added that ID to wireless-testing 6 months ago, and it entered mainline kernel at 2.6.32. (not in 2.6.31). Sorry I don't have data on 2.6.31.x, but you probably should just upgrade to 2.6.32+
BTW, wiki is't always up to date... but in any case, the id is in 2.6.32 for certain.
following your instruction about the zd1211rw with a device ID 083a:e501, I've installed a 2.6.32 kernel (AMD64) and now as you said I don't need the echo part, and also find the id in the modinfo zd1211rw. Thanks for that!
So, when I connect the usb device wlan1 appears, but now the problem is that it's not possible to scan:
# iwlist wlan1 scan