Configuring Wacom for triple screens


I got three screens on two graphics cards and one Wacom intuos3 which I want to use on all three screens. In my xorg.conf there are no special flags except for the KeepShape “on” flag.

The problem I got is that the wacom gets mapped partially on each monitor. In other words, the wacom pen gets mapped on only one third of the horizontal area on each screen. So if I move the pen on my wacom from left to right, the cursor moves across the right screen for about a third and then jumps to the center screen for a third and then to the right screen for the last third.

So how can I fix this?? It can’t be that difficult!!

Thanks in advance,