Hello Kashif,

There are two things that maybe causing the problem:-

1) Is the Tyros 2 using the very latest firmware update?

2) Because the Tyros 1 & 2 operate on a different system to the later models, it could well be the
Grand Piano wav. isn't compatible with the T2.

Sorry! I don't have any answers for your problem but at least you could check these two possible causes and then get some help direct from Yamaha themselves if need be.

Good luck. Audrey