just bought an HTC Eris and the alarm works, just doesn't make any noise. It vibrates as well, but NO NOISE. How do I make it make noise? Everything else I do makes noise, phone calls, notifications, everything, just not the ALARM. Please help if you would.

 

Thank you!
It worked!
It seems that it makes the screen to take a little longer to sleep.
I hope HTC fix this bug in their new update, Alarm should be a basic feature in any phone.