No mapping exist from object type

Question

Hello

I am getting this erro that I never had before, any help is appreciated

No mapping exists from object type System.Data.SqlClient.SqlConnection to a known managed provider native type.

My code:
Dim cmd As SqlClient.SqlCommand
Dim cmdString As String = ("SELECT [Position] FROM [login] WHERE (([User] = ?) AND ([Password] = ?))")
Dim conn As New SqlClient.SqlConnection("Data Source=ED_SDESKTOP\SQLEXPRESS;Initial Catalog=Website;Integrated Security=SSPI")
cmd = New SqlClient.SqlCommand(cmdString, conn)
cmd.Parameters.Add("SELECT [Position] FROM [login] WHERE (([User] = ?) AND ([Password] = ?))", conn)
conn.Open()
Dim myReader As SqlClient.SqlDataReader
myReader = cmd.ExecuteReader(CommandBehavior.CloseConnection)
If myReader.Read() Then
FormsAuthentication.RedirectFromLoginPage(txtUsername.Text, False)
Else
Response.Write("Invalid credentials")
End If
myReader.Close()