SBS 2008 premium with virtuals

Hello

I'm using SBS 2008 premium,

As a host I've got running windows 2008 standard (from the SBS disks)

In the virtual:

SBS 2008 main & windows 2008 running SQL server

All the above is properly licensed with MS, all is from the SBS 2008 premium disks, I've purchased backup exec 12.5 for small business server premium, when i install the software it does not recognise the setup as SBS, in the symantec blurb it states 2008 premium as supported.

How can I use the licesnse key ?

Thanks

john