argument are of the wrong type are out of acceptable range , are in conflict with

[handsomeaspen]

this code is the code of log in section . but it keeps me giving an debug saying
argument are of the wrong type are out of acceptable range , are in conflict with one another

i have a registration section also and it works well

Dim rs As New ADODB.Recordset
With rs
    .Open "SELECT * FROM tblSecurity WHERE Username = '" & txtUser.Text & "'", conn, adOpenStatic, adLockReadOnly
    If rs.EOF Then
        If txtPass.Text = !Password Then
 
            MsgBox "Username and Password Succesful!"
 
 
        Else
 
            MsgBox "Invalid Password, Try again!", vbCritical, "Warning"
            txtUser.Text = ""
            txtPass.Text = ""
            txtUser.SetFocus
            ctr = ctr + 1
        End If
    Else
        MsgBox "Invalid Login, Try again!", vbCritical, "Warning"
        txtUser.Text = ""
        txtPass.Text = ""
        txtUser.SetFocus
       ctr = ctr + 1
       End If
        If ctr = 3 Then
                    objLock (True)
                MsgBox "You have attempted to Login 3 Times in the system. " & _
                        "Please call the Programmer for Assistance " _
                        , vbCritical, "Warning Information"
                End If
 
    .Close
    Set rs = Nothing
 
End With
End Sub