Why my USB device is not HID to begin with?

Hi all,
I have trouble with installing vhidmini sample in the latest DDK.
I modified vhidmini sample in the latest DDK.and then build it.
1)in vhidmini.h change the content of HID_REPORT_DESCRIPTOR
DefaultReportDescriptor with the data copied from USB device firmware;
2)change HIDMINI_PID,HIDMINI_VID with the USB device pid,vid.
I pluged the USB device,used devcon to install vhidmini.sys,it prompted “Updating drivers for devcon failed”.Also in device manager,“unkownn device” appears under “human Input device”.
Could you please advice?Thanks a lot
Yu Zhou


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