BlueTooth mouse cursor shaking/ MacPro

Hi

I have my Apple mouse cursor shaking on the screen. I was reading and it seems the bluetooth signal from my 2008 Mac Pro. Some how is weak not, if I go very close to the Mac Pro the cursor moves just fine. If I re start the Mac Pro the cursor moves fine, but after a few minutes starts trembling.

Normally the mouse is just 4 feet from the Mac Pro when this is happening.

My question is: does anybody knows about if I have to reset or upgrade anything in my Mac Pro in order to make it run fine?

I have OS 10.9.1
BluTooth Firmware 1965

I am looking into the manufacturer but I do not see software update.

It is a Bermuda Triangle on my desk. If I move the mouse 8 inches closer to the Mac Pro it works. If I run the mouse over my lap 5 feet from the Mac Pro it works. It is just that precise spot on the table that has the same surface as any other table in the office. May be a node of frequencies interfering with the blue tooth signal.