In one of my databases, I can't hide the system stored procedures in the Enterprise Manager Console. All other system objects are hidden in the database. Other databases on the same server have all their system objects, including SPs hidden.
Does anyone know why this would be and what I can do about it?

I used the normal way to hide system objects:
In the SQL Server Enterprise Manager Console, I right-click on the SQL Server, click on Edit SQL Server properties and then unclick the box 'Show system databases and system objects'.

I am using SQL Server 2000 - 8.00

Many thanks