re-image the srver The Partation of hard drive is change

hi guys

i need your help anyone of you there, i have server windows7 ultimate 64bit, C\:drive-500GIG, D:\Drive-500GIG(Archive), S:\Drive-4T(Storage), I take image for back up using Norton ghost 11.0 is no problem. now I re-image the server there have problem in the hard drive, the D:\Drive become S:\Drive, and the S:\Drive become D:\Drive is twisted by itself, i have 3 times to re-image is the same result. why is twisted by itself? i need your helf guys.thnz