Cannot map user to login in SQL Server 2005

I have am in the process of trying to learn how to convert Access 2003 tables to SQL Server 2005 and link the tables to my Access frontend. I am new to SQL Server 2005.

I have SQL server set up using Windows Authentication mode. I have a database called db7 that I converted from Access 2003. I created a Login in Sql server called domain\username. However  under Login properties Security->Logins->User Mapping, I cannot select my database db7. When I select it, there are no error messages but when I open that page up again, it is no longer selected.

I can successfully select other databases.

Under db7->Security->Users, I have created a user with the same name domain\username and it is pointing to the correct database db7 (Extended Properties).

When I look at the properties for that database db7 (right click properties), when I go to Permissions, I cannot add the user either. Again it appears I'm adding it successfully (no error messages) but when I go back in, the user is no longer there.

mph23Software developerAsked:
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mph23Software developerAuthor Commented:
I figured it out. The user was in 2 databases. I guess you can only be in one.

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Microsoft SQL Server 2005

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