Micro XP and Mini XP all have a lot of drivers removed from the OS. This is your problem. These trimmed versions of XP usually remove support for the Transmeta Crusoe processor. This forces your tablet into x86 emulation mode and will make it very slow as well as lost functionality.
If you replace the 512mb flash drive module with a 4gb module then you can install a full version of XP from the CD and your processor will be recognized automatically. You can also make your own version of mini XP with a tool called NLITE - get it here: http://www.nliteos.com/
You can create your own lite version of XP and leave in support for your processor.
Good luck, -DT_Dave