Magic mouse don't start up

I have a brand new mac pro that came with a magic mouse. I have a Wacom Tablet installed on the mac pro and I use it too.

I use both the mouse and the tablet and go back and forth between them.

But everytime I start up the Mac Pro the magic mouse doens't automatically connect to the Mac Pro. I have to rescan the bluetooth devices and reconnect it every time. Is this a conflict between the mouse and the tablet? Or is it just a bluetooth mouse problem?