GIMP + Blender + Tablet = nothing

Hi, I have a little problem. I have a Genius tablet that I use in GIMP. But when I run Blender and GIMP at once, the tablet stops working, it loses it’s pressure sensitivity in gimp. I tried running GIMP first (tablet worked fine) and the Blender, which corrupted GIMP and the tablet didnť work at all. No click reactions. So I retarted GIMP and entered the typical situation with pressure detection not working. It’s definitely Blender+GIMP problem, becaise the tablet works elsewhere just fine at the same time. Have you ever experienced anything like this?
Blender 2.48a
GIMP 2.6
Genius G-Pen M712