Native Process calling TabTip.exe not working on Windows 8

Hey,

I'm desperately trying to get the nice Touch Keyboard to display on Windows 8 for my AIR App.

Looking at this article http://sukantadas.wordpress.com/2012/10/16/executing-exe-file-from-desktop-through-adobe-air/ it seems possible, and it works nicely on my windows 7 machine, beit that TabTip.exe is a slightly different keyboard on Win7.

Over to windows 8, I can't get it to work for love nor money. ('m testing on this http://www.samsung.com/us/business/computing/tablet-pcs/XE700T1C-A03US).

It works fine if I wrapp the SWF with MDM.ZINC - Mdm.System.exec("C:\\Program Files\\Common Files\\microsoft shared\\ink\\TabTip.exe"); but then I'm out of the AIR SDK and stuck with MDM Zinc; which doesn't even recognise MouseDown events on Windows 8 (touching the screen).. but that's another story - http://www.mdmforum.com/forum/index.php?showtopic=29963

Please can someone help me as I've been pulling my hair out..