Database connection problem

Hi, im a absolute beginner to programming. And im experiencing problems with establishing a connection to my databases. I capture the exception in a messagebox wich says:

"The specified schema name "dbUsers" either does not exist or you do not have permission to use it."

I have been following several different tutorials, that tells me to establish the connection this way:

CODE:
{
SqlConnection connUser = new SqlConnection();

private void btnNewUser_Click(object sender, EventArgs e)
{
connUser.ConnectionString= "DataSource=.\\SQLEXPRESS;AttachDbFilename=C:\\Robin\\Programmering\\Petproject\\Program\\Contact Manager\\Contact Manager\\dbUsers.mdf;Integrated Security=True;User Instance=True";

connUser.Open();
}
}


Please tell me what im doing wrong.

/Robin

Give this a look over

http://connectionstrings.com/sql-server-2005