Front USB doesn't work with some devices

Hi,
  I have 2 front USB ports and have wired everything correctly (not using the 10th pin).  I tried my digital camera and the maxtor USB hard drive and they both work.  When I try plugging the Adaptec VideOh! USB capturing device, it doesn't seem to work right.  It is detected and the drivers for it installed correctly, but I can't capture any video.  When I unplugged it and plugged it to any of the 4 ports on the back, it works fine.  The D-bracket ports also worked ok with the device.  I wired the 2 front usb ports the same way as the d-bracket (they both have the same color wirings).  The front ports seemed to work ok with the other devices I mentioned, just not the Adaptec Videoh! USB device.  There is a JUSB1 and a JUSB2 on the motherboard.  Are both the same?  I have JUSB1 for the D-bracket and JUSB2 for the front usb ports.  Both are wired the same.  I just wonder why the Adaptec device can work with the D-bracket and not the front USB ports even when they are connected the same way.  Any suggestions?

At the cable end that plugs into the motherboard snip the jumpers between pins 7-9 and 8-10. See Wonkanoby's signature for a link to diagrams.

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