Hi Steve & Sinh,

You could need to look at:

adding a code group to the rssrvpolicy.config - http://support.microsoft.com/kb/842419 (explains this particular error)

or:

http://msdn.microsoft.com/en-us/library/ms154466(SQL.90).aspx

- for an overview of custom assembly security.

Let us all know what exactly you have to do!

Regards,

Adam