i got the game for my birthday, adding to my love affair with Square Enix/Square Soft, but i'm stuck. If anyone's played the game and would be willing to help me out, here's the deal.

i'm back in Radiata Castle after the dwarf mission and i went to the training room with Jack. In the list of practices, the second is 'four-hit combo' and i just can't get it. i'm sure i'm doing something wrong, or perhaps i'm just inept, but... can anyone tell me how to accomplish this?