Gimp Brush and cursor misalignment

Since finding my tablet i have been having a problem in the GIMP ( and i cant be bothered to sign up to there forum)

i have dual screens (tablet is set to only work with one) its a generic cheapo tablet (p active)

screenshots dont realy explain this well…

the brush paints/selects etc about 2 inches to the left of the mouse cursor…

HELP please…

Joe