Can I use GSS30 licenses for GSS25?

I ordered some addtional GSS licenses for my GSS25 system.  They were GSS30 license.  When I tried to add the *.slf file I received the following error:

A licensing error occurred:

No licenses exist for Symantec Ghost Solution Suite (0x80000013)

Is there a way I can use the 3.0 licenses with my 2.5 system?  ..an easy way?

Thank you