Restore master Database for Named Instance

I'm testing my DR procedures, and I'm having an issue restoring the master database for a named instance of SQL. I'm running SQLBackup 7.7.0.18. My current configuration is:

New Server
- Default Instance (SQL Server 2014 Standard Edition)
- SQL2012 (Named Instance of SQL Server 2012 Standard Edition)

I was able to successfully restore all of the system and user databases for the default instance of SQL Server 2014. The problem occurs when I try to use the same processes to restore the named instance of SQL2012. I used the following process:

- Open a Command Prompt (Run as Administrator)
- sqlservr.exe -c -m -s SQL2012
- The named instance of SQL2012 is successfully running in single-user mode

- Open a Command Prompt (Run as Administrator)
- Navigate to the directory where SQLBackupC.exe is located for the named instance (SQL2012)
- C:Program Files (x86)Red GateSQL Backup 7SQL2012
- Restore the master database
SQLBackupC.exe -SQL "RESTORE DATABASE master FROM DISK = 'E:SQLBakFULL_master_20150908_105349.sqb' WITH REPLACE " -I SQL2012
- This is where the error occurs.
- It appears as though the restore command is attempting to access the default instance of SQL instead of the named instance. I know this for two reasons: First of all, I opened up SSMS for the default instance and ran Activity Manager. When I run the restore command for the named instance, I see SQLBackupC in the Activity Manager for the default instance. Secondly, I get a different error message if the default instance is running or stopped.

I have navigated to the correct folder for the named instance related to Red Gate. I'm using the proper instance parameter (-I), so I have no idea why SQLBackupC is trying to use the default instance. Any assistance would greatly be appreciated!!!