Hey, once again I went to the configure security settings and now I was able to start mirroring successfully. I don't how it worked. However thanks for ur patience...

The principal files are:

logical datafile name 'Test_Mirror_Db' and physical path is 'C:\Program Files\Microsoft SQL Server\MSSQL.1\MSSQL\DATA\Test_Mirror_Db.mdf'

logical logfile name 'Test_Mirror_Db_log' and physical path is 'C:\Program Files\Microsoft SQL Server\MSSQL.1\MSSQL\DATA\Test_Mirror_Db_log.ldf'

The mirror files are:

logical...