Hi,

Would you please post your code ? It will provide us more information about your problem.

ba7ranya

I created sql user I tried to connect from SSMS from it but error 18456 occure

Please check your sql server wether server authentication has changed to mixed authentication.

Check your username and password.

There is a blog taking about this issue: http://www.katieandemil.com/microsoft-sql-server-error-18456-login-failed-for-user.

Thanks.