Upgrade dell dimension e510 to motherboard dimension e520.

Hello, I tried to upgrade from the motherboard of my dell e510 putting a plate of a dell dimension e520.

the problem is that I get an error message:

Alert! Air temperature sensor not detected
Alert! the processor is not supported

I understand the message unsupported processor, put a pentium 4 670 3.8.

But I do not understand how to solve the problem of air sensor.

Please I need help, thanks.