hello

I bought a used POD 2.0.  I'd like to register the device.  . i have a midi-interface for using line6 Monkey and line 6 edit and so I have to register. But it dosnt works. the number on the back of the pod is: (21)pd2c3217008890 But I cant register with this number. It shows me:An error occurred while processing your request Supplied serial does not validate for the selected product ( Error: 533)

Can you help me?