Dell calibration and leopard

[joubex]

Hello
I have a Huey spyder to calibrate my Dell 30'' monitor with my PowerMac.
Now I can not calibrate any more: at the end of the process, there's a message saying that there is an error with the sensor, or I don't choose the right type of monitor...
Is there anybody who experience that kind of problem (and find a solution??)
Thanks for your help

Joubex