This only happens in Rise Of The Empire. I have the PS2 version.
My problem is on the Knightfall Level in Rise Of The Empire, where once I play Anakin, I can attack people, but he doesn't kill anyone. The only way he can kill someone is by throwing his Lightsaber or by Choking an enemy.
Is this a glitch? I'll say it again, it only happens in Rise Of The Empire.