Hello All,

I'm confused about permissions...  

I have user X, who is a member of db_owner role.
I have stored procedures owned by dbo.
The database is owned by dbo (sa).

User X is making a connection from a "service", executing the stored
procedure,
but gets the "Execution permission denied" error...  

I've checked for deny permissions but haven't found any related to user X...

It's my understanding that the db_owner has all permissions to do anything
within
the database...  If this is incorrect, could someone recommend a good
book/white paper defining permissions...  I would greatly appreciate it...

Thanks for your input...