Boot from USB DVD drive not working

[rogue]

Hello, I am trying to install win7 from a USB DVD drive. I currently have Ubuntu installed. The fit will boot to the HD every time whether or not a bootable DVD is in the USB drive and the USB DVD drive is higher in the boot order in the bios. I have tried excluding the HD from the bootable device list but then get the "No operating system found" message. I had a different HD in before (with a corrupted install of win7) that was letting me boot from the USB DVD drive.

Any thoughts or advice would be much appreciated.

[yogev_ezra]

See if the USB DVD gets enough power. Did you connect it with dual-USB cable? (One for power, other for data). Usually when USB DVD does not get enough power, it will spin but not read the disk.