DataSource Controls :: SQLCacheDependancy Invalidates Cache Immediately SQL Server 2005?

I'm having a real problem trying to get the SQLCacheDependancy working, whenever I add data to the Cache with a SQLCahceDependancy it is invalidated almost immediately. So when I try to access that cache key again it is always null.

My setup is as follows: SQL server 2005 (on remote machine)

Visual Studio 2005 ASP.NET 3.5 on Windows XP Machine.i have run the following script on the DB to set up permissions etc (these script are from various post):

-----------------------------------------------SQL Scripts start -----------------------------------------------------------------------------------------

use db_Company;
ALTER DATABASE db_Company SET ENABLE_BROKER;
[Code]....