db owner

We are using SQL Express and I have a problem with dbo.
On my machine if I logon to SQL Express using windows authentication
and create a new database I automatically have db_owner role membership
on the new database.
On a colleagues machine, if he logs onto his SQL Express using windows
authentication and creates a new database he does NOT have db_owner role
membership on the new database.
How come?
I have checked pretty much everythng - windows built in admins, SQL express
sysadmin roles, service pack versions but I can not find any difference in
setup.
What should I do to his machine/SQL Express setup so he automatically has
db_owner role membership for every newly created database?
Thanks
CharlieCharlie
What if you create login as the following
CREATE LOGIN Charlie WITH password='pp'
CREATE USER Charlie FOR LOGIN Charlie
WITH DEFAULT_SCHEMA=dbo
EXEC sp_addrolemembe 'db_owner','Charlie'
"Charlie" <Charlie@.discussions.microsoft.com> wrote in message
news:0ECAEB63-1450-40C9-B51D-01F5F4C9B92E@.microsoft.com...
> We are using SQL Express and I have a problem with dbo.
> On my machine if I logon to SQL Express using windows authentication
> and create a new database I automatically have db_owner role membership
> on the new database.
> On a colleagues machine, if he logs onto his SQL Express using windows
> authentication and creates a new database he does NOT have db_owner role
> membership on the new database.
> How come?
> I have checked pretty much everythng - windows built in admins, SQL
> express
> sysadmin roles, service pack versions but I can not find any difference in
> setup.
> What should I do to his machine/SQL Express setup so he automatically has
> db_owner role membership for every newly created database?
>
> Thanks
> Charlie
>