DS 7.5 Prep PC for Image Capture failing

I am having the same problem as listed in this post: https://www-secure.symantec.com/connect/forums/ds-...

I assign the task to caputre a ghost image of PC and sysprep flashes in Task Manager, unattend.xml is created and then nothing happens until the task times out.

The PC is a clean install from DVD with current Windows Updated and Drivers.  SEP12.1.xxx is also running on the PC.

slmgr /dlv is at 1 with a KMS license.

Any ideas?

Thanks

Pete.