ElectrokineticArtest

So I've recently upgraded to an Intuos Pro, and it doesn't seem to be working with SAI. 
At first i thought it was the drivers and updated them because the whole unit was lacking pen pressure and sensitivity. But when i updated it, Paint tool wouldn't recognize my tablet it all. 

So i went into registration editor in the control panel to uninstall and wipe out any information on my old bamboo dock. When i did this it worked at first but then died out (but still no pen pressure was found)

I went to check the pressure sensitivity on deviantart muro and it worked so i know it wasn't the tablet either. 

I deleted SAI and re installed it then did the same to the drivers, and still the Program was dead to the Tablet.

Finally i went into Wacom tablet preference file utility>Remove All User Preferences
Then went into Wacom Tablet Properties and re-added SAI for the 5th time. Then, I finally got SAI to recognize the Intuos again.

Although i have to do it every time i close and re-open Paint tool SAI.

How ever still the Pen pressure is gone and the it lags allot (no smooth lines)

I've tried most of the resolves other people have attempted, but my tablet still wont work.

Can anybody please help?