I'm sorry, but a bootcamp partition cannot be restored from a disk image created using disk utility, the files are there, but you see, a bootcamp partition is a NTFS file system and those disk images do not support NTFS, basically you copied your files to an HFS (Mac) image, it cannot be restored as NTFS. NTFS specific attributes like permissions are lost also.
The good thing is that you can copy your files from that image to the new Bootcamp installation you will have to start from scratch, next time use something like Winclone (google it).
If you want to make a Bootcamp installation again you'll have to use bootcamp assistant.app, however that's not the only way, and unless you need to boot windows natively, I recommend you, you make a virtual hdd instead, it can be backed up with Time Machine.
Last edited: Jul 19, 2013