What version of Ghost are you using? If it is a 12 year old version, then it has no Windows 7 capability.
If it is booting to DOS, you may also lack modern hardware support, eg SATA.
On the other hand, if you are using Ghost Solution Suite at the latest 2.5.1.2266 build, then you do have Windows 7 capabilities, but your issue is most likely as described above.
Finally, if you are using a version of NORTON ghost, then look for the link to the Norton community which is in a sticky posting at the top of this forum.