Hardware keyboard makes all emulators lag?

[kameisama]

Hello all,
I recently tried a few emulators on my TP (PocketSNES, PocketNester Plus, MorphGear) and they all seemed to work fairly well. However, every time I try to use the hardware keyboard to control these games, the emulator will briefly pause to an unbearably low speed. When I press buttons in rapid succession, the emulator basically comes to a screeching halt, and then goes back to normal when I stop pressing buttons.
In MorphGear, I've tried changing the CPU throttling setting and the thread priority setting, but to no avail.
I'm using Gyrator 2 and KForTouchPro, but none of that seems to have any effect on performance.
Is there some keyboard setting I'm missing, or has anyone else had this problem? If so, how did you solve it?