BCM Restore error

I'm trying to back up my database to another computer. I am the sole user /
owner of this database. I backuped the file just fine, transferred it to the
other computer, went through the restore process and got the following error
message:

You cannot restore this database becuase you were not a user when the
database was backed up. Contact the owner of the database or a system
administrator for more information. Your original database has not changed.

Can anyone help me out?

> You cannot restore this database becuase you were not a user when the
> database was backed up. Contact the owner of the database or a system
> administrator for more information. Your original database has not changed.

BCM seems to add some pretty strange access to what should be a
straightforward SQL Server database. From other posts I have read on here
you might have some luck if you try logging onto the new computer with
exactly the same user name and password as were on the previous machine.

Another way of moving may be to use the SQL Server Management Studio to
detach the database from the original machine when nobody is accessing the
data, then copy the .MDF and .LDF files to the new machine, then re-attach
the original database on the original machine. Now go to the new machine and
again in SSMS attach the copied files to the database instance there.

Kevin