If you are trying to properly install a Netgear USB WLAN dongle model WG111v3 on an Ubuntu machine running the 64-bit variant - just give up!
There are numerous tutorials telling you that it would work, in version v1, v2 or v3 of the hardware - but they are all referring to the 32-bit version!
ndiswrapper uses the windows drivers, and since there are no proper 64bit XP drivers available, the device won't work (yes, there are Vista 64 bit drivers, but ndiswrapper does not yet support Vista drivers). So be clever and give up, or install ubuntu 32 bit.
Tip: find out which hardware version your WG111 is:
mine was "0846:4260"