Thanks for the Tips.If i take down the atmega,i can hear the sound when plug in the usb into the board(driver ok i think),but when i try to upload,only the Rx led flashes.Tx is doing nothing.Meither of the 2 chips get hot,the board is like in the normal state.
Is there a way to burn in the boatloader with AVR Studio?I have the AVR Dragon around for ISP communication.Thanks