I have a Dell C640. I made an image of this using ZenWorks 6.5. I also
tested it by doing a re-image. Worked 100%

Since then I've installed Zenworks 7 and today my Laptop fell over so I
want to re-image it.

I get the PXE boot OK, hold CTRL-ALT and then it just hangs on TFTP

I'm guessing it's a driver. If it is how do I fix it?