Ghost 15 restore error: E7c30012: no more free sectors

I am a newbie to Ghost.  I just bought Ghost 15.0.  I made a backup of my 160G C: main drive with about 25G of data in one partition.  I tried to restore this image to a new blank 120G drive but  I get this error.  Can't I restore 25G of data to a 120G drive?  What is the problem?  I can't find any mention of this problem anywhere.  Please help.  Thanks.