If I understand your post,
Download Active Sync from
here. That gives you the USB controller. You can get many different languages.
Windows Mobile 5 is installed on the X51v already.
If you need to re install it, Hard Reset.
To Hard Reset, hold down the power button and push the Stylus into the small hole in the back of the axim.
This will wipe all your data and programs and restore the factory defaults.
If you have other questions write them in English first, but it helps if you write in your own language as well.