Ghost 15.0 - Recovery CD

I am having problems trying to create a custom recovery CD.  I am running Ghost 15.0 in Win7.

 

I have the file NBRTSOS.iso on my hard drive.  When I go to create the custom CD I am pointing Ghost to the folder that contains the .iso file.  When I click next I get the error "You must select a valid Symantec recovery disc."  I have also tried burning the iso image to a CD and pointing Ghost to my DVD drive but I still get the same error.  What am I doing wrong?