volume horn doesn't work

[themsn]

Not sure if this is a hardware issue, but after upgrading to wm6.5
i couldn't tap the volume horn on the task bar anymore.

So now I have to go into comm manager to switch from vibrate to sound, which I can live with, but the problem is I can't raise the volume while I'm on a call; so I can barely hear the other person.

Does anyone else have this problem? or better yet have a solution? The problem started about 2 weeks after I installed wm6.5.

I've even reflashed the phone with 6.5 but this time the volume horn wouldn't work after 15 minutes.

any help would be greatly appreciated. thank you.