Ghost 15 not seeing external h d when restoring from Recovery CD

Hi.  I am using the latest version of Norton Ghost 15, with my new HP that has Windows 7 Home bit 64 version. I can make a backup of my drive, and restore in Windows, but if I try to restore my image using the Symantec Recovery disc, the computer doesn't see my external drive.   After spending hours with Symantec and HP tech support, I finally tried to make a recovery disc and saw this message:"symantec Recovery disk can only use 32 bit drivers."  Does this mean that the program won't work in the 64 bit version of Windows 7 because I assume my USB port is a 64bit driver?  Any help would be appreciated.