Number pad woes with XP

[Martin Sliwinski]

I use the number pad input for an Eprime experiment. It worked fine in
Windows NT, but now that I've switched computers and use XP, Eprime will
not recognize the number pad as giving numeric input. I have the numlock
key on (I also toggled it on and off to be sure), and no matter what,
when I press 1 on the number pad, Eprime sees it as <END>. Same is true
for any number of the keypad (e.g., 3 is seen as <PAGEDOWN>).

Is this a known issue with XP? Does anyone know of a fix or work around?
thanks!