How to enable mirroring feature?

Hi

When I try to mirror a database, I get an error about disability of Mirroring . I m asked to set Trace Flag to 1400 at startup.

I dont know what r startup options and cant get help on it too.

Will someone let me know how can I enable mirroring in SQL server 2005

Regards

If you search on startup options in the Books Online, it will bring up the topic "Trace Flags (Transact-SQL)".

-Matt