I found this at
http://www.saitekusa.com/support/oth...orgsupp.html#3
3 Q: Why doesn't my Saitek game controller appear in the game controller list when I click Add?
A: Try re-installing the Saitek driver.
You may have exceeded the limit of controllers, which can be viewed in Windows. In game controllers, click Add, click on a manufacturers controller that you do not wish to use, then press the Del key on your keyboard, then click OK. Finally click Add, then click on your Saitek Controller which should now appear in the list.
The game controller section of your Windows registry may be corrupt. Download the file removejoy.zip from the download area of the Saitek website, unzip and run the file removejoy.exe, then re-try adding your controller.
Hope this helps