Try emailing support then bud. Might be the quickest resolution.
Just out of curiosity - are you using english regional or another language? It could be that if the language you are using is one of the problem sets, then the full functionality of your keyboard isn't available to you. I must confess though that thats more of a guess than reasoned logic.
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You should be able to use standard number keys though.
EDIT: NumPad does work in BG2 from a little testing. Don't know what's happening with BG:EE. Can't be bothered checking it.
Just out of curiosity - are you using english regional or another language? It could be that if the language you are using is one of the problem sets, then the full functionality of your keyboard isn't available to you. I must confess though that thats more of a guess than reasoned logic.