webcamd hung and pwcview doesn't work

I tried to make my old webcam (Creative VF-0040) work on my FreeBSD v8.1. After installed v4l_compat, libv4l, pwcview cuse4bsd, webcamd from the ports,
kldload cuse4bsd.
webcamd -d ugen2.2 -i 0 -v 0
it stops there after output:
Code:
     Creating /dev/video0
      Creating /dev/input/event0

Is this right? or should it exit to the shell? I checked the /dev/video0 and /dev/input/event0 are there.

Try to run pwcview, it says
Code:
Failed to get current picture info: Invalid argument
pwcview -s cif or sif doesn't work either.

Any help is appreciated.
 
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