AVR Dragon dW ATMEGA 328 invalid Sig. [solved]

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I have an AVR dragon, and I'm trying to enable Debug wire. SPI works and i can program the chip, but when i try to enter debug-wire mode I get this error:

[ERROR] Unexpected signature 0x001e9514 (expected 0x001e910a)., ModuleName: TCF (TCF command: Device:startSession failed.)

I have a ATMEGA 328-PU not a 328P, and I'm using Atmel Studio 6. Can anyone explain this/help?

Edit: AH, Never mind I had multiple projects with different devices and atmel studio was trying to activate debug for my attiny2123. It's working now, Thanks anyways guys.