DB Master Key - Sql Server

This is not working with me on SQL Server 2005:

Code: ( text )

use XDataBaseCREATE MASTER KEY ENCRYPTION BY PASSWORD = 'password'go

However it was given on MS site:
http://msdn2.microsoft.com/en-us/library/ms174382.aspx
Please advice. Thanks.actually the password must be > 8 chars and contain upper/lower case and numeric/ Non-alphanumeric characters.

Password = 'password' is used having exactly 8 chars,
i think this may causing the problem