Win 7 Ult: keyboard layout shortcuts getting reset

Hello,
I have quite a few input languages enabled on Windows 7 Ultimate and I want to navigate between them using keyboard shortcuts like I used to do on Windows XP. I know how to assign the shortcuts but the trouble is that all of the shortcuts keep getting reset every time I shut down the PC and after I log on again none of them work… I can of course go to Control Panel and assign the shortcuts again but it's a bit irritating when you have to do it for 8 languages every day.

Oddly enough, the shortcuts for two of eight languages that I have are automatically restored when I go to this dialog box where shortcuts may be assigned — without me making any changes other than just clicking OK. So these two don't seem to be completely lost, it just seems that Windows 'forgets' about them until I open the dialog box with the shortcut assignments.

Does anyone know where in the registry (so I suppose) the shortcut assignments are stored? If I knew, I'd write a program that would restore them every time I log on.

Thanks very much,
vpprof