Trouble Installing Backup Exec on 2003 Server

I've run into an issue installing Backup Exec on a Windows 2003 Server.  I get the following error message during the install:

ERROR: Failed to have success running InstallVSSProvider function in MSInstallVSSProvider Function.

 

If I click OK, the install will complete, but I'm unable to actually create a backup once I get the program running.  I previously had Symantec Ghost Solution Suite 2.5 installed and I'm wondering if that's part of the problem.  While researching this issue, it sounds like I may need to run the Norton Removal Tool before trying another install, but I'm not sure which version of it I need.  I appreciate any help.  Thanks.