About asp.net login control

Question

I have used the login control in my asp.net application. It has form based authentication. I have created one user from asp.net configuration menu. When I test login control in visual studio development environment it works well. When I go to browser and try to login it gives following error message:-

 

Login failed for user ''. The user is not associated with a trusted SQL Server connection.

please give me the solution of above problem