The problem

You have a SQL Login created for your account usr_test
Everything appears fine, but you cannot connect.
When you look in the users section of your database, the user appears with a disabled icon? (little red down arrow)

The issue

Your user does not have “CONNECT” permission and therefore shows as disabled.

The solution

In SQL management studio, do the following;

1. Connect to your SQL Server
2. Switch to the database having the issues
   [sql]Use MyDatabase
   GO
   [/sql]
3. Execute the following statement
   [sql]
   Grant Connect to usr_test
   [/sql]

Refresh the list of users and now the user looks normal and you can connect to the database