heres my problem........

I'm using a Yamaha PSR9000 keyboard. I have a few SMF songs that I have used in the past on a Kn5000, Kn6000, Solton X1, and now the PSR9000. On all the other units the songs sound fine when played. But when I play them on the Psr9000 I hear a "Hand Clap" on the drum track that isn't supposed to be there
and some cymbal crashes in the wrong places also. I tried changing drum sets but nothing helps. Why is it reading the drum set wrong? There is no way to just edit the claping that I know of on the unit. Does anyone have any suggestions?

thanx

Donny