Sims 2 on Nintendo DS

Hi

I have had this game since november, I love it, but does anyone know if
there's a way to completely delete all the saved games, and keyboard music..

Reason I'm asking is the game is full of glitches, and on going into the
Sims inventory, the DS will freeze, as will going in the Sax Lounge for some
reason, and also when accessing the Control Panel in the Managers Suite...

It wasn't like this when I first started using it, and the DS works fine on
other games..

Take care all
Julia