Problem CAN Bus Cape is not detected on BeagleBone A6

Ok,
It is working well with this image BeagleBone_Rev_A6A_Production_11_22_2012.
I think my problem is due to the min usb port. When I 'am using it, the BeagleBone has strange dmesg …
Now I 'am always using the ethernet port and the power supply

Regards