X61-Ubuntu 9.04-hdaps-gl meets mistake!

[durer]

I have followed the instructions on"Thinkwiki " to set up the APS for Ubuntu 9.04 of X61.
After rebooting my Ubuntu 9.04, the aps funtion seems to be Ok. However, when I type "hdaps-gl" again, I found that the 3D-demon worked in a wrong way. Just as shown Here, when I move my X61 up, demon showed a movement to left. It seems that the x&y axis of the position sensors mix up.
If I reload the module by typing "make load HDAPS=1 FORCE_IO=1", It works well again. But when rebooting, it works wrong again.
There are a lot of people meet the same problem as me when googling.
Can anyone know how to fix it up,or Is this just a bug for the HDAPS?