Netbackup 7.5 SQL Client not installing

Client Server: Windows 2003 Enterprise R1/SP2

Master Server: Windows 2008 R1 Standard / Netbackup 7.5.0.5

I'm tring to install the Netbackup client on the server above but when I get to the install it has two options grayed out, Install Locally and Install clustered, I can only "Install to multiple computers on your network".  I have tried running this from the console with administrative privledges but it doesn't seem to give me the local option.

Any ideas why this would be the case?  From what I can see only R2/SP0 and R1/SP1 have been retired so R1/SP2 shouldn't be a problem.