Android debugging

joan
We have ported the Android 1.5 to mini 2440 and it run right over the
mini 2440.

We have installed on the Pc the latest Android SDK and Eclipse ADT
Plugin and we want to debug the device via USB.

On micro24240 device menu we select
Settings->Applications->Development-> USB debugging (debug mode when
USB is connected)

We connect the USB0 to PC, but the PC not detects the device for to
assign later the Android SDK USB driver. What is wrong in that steps?

Regards