Something´s changed. Until a couple of weeks ago the numbers on my keyboard worked fine for making phone selections i.e.. "if you know your party´s extention mark it now" or "for sales press 3" etc. Now all of a sudden my keyboard seems to be disconnected from the Skype system. Any ideas how to get it to work again?

Hi Pregunda, is the keyboard a standard type keyboard? Are you using the number keys above your letters on the keyboard or the 10 key type numbers on the right side?

Is your "caps lock" key off? If not then you are entering "other than number" characters each time you hit the number keys at the top of the keyboard. Just as if you were holding the shift key.
Also the "num lock" will effect the keys on the right side of the keyboard. It should be set to use the number keys. Try adjusting those two keys and see if that helps.