ช่วยแก้โค้ด ตัวนี้ ไม่รุ้ว่ามัน error ตรงไหนคัรบ .NET, MySQL, VB.NET

Private Sub BtnEditCus_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles BtnEditCus.Click
        Dim Query As String
        con.Open()

        Query = "UPDATE Customer SET CustomerName ='" + txtNameCus.Text + "'"
        Query = Query + "Sex = " + txtSexCus.Text
        Query = Query + "Address = " + txtAddressCus.Text
        Query = Query + "Telephone = " + txtTelCus.Text
        Query = Query + " WHERE CustomerID = " + txtIdCus.Text
        Dim cmd As MySqlCommand = New MySqlCommand(Query, con)
        MsgBox(Query)
        Dim i As Integer = cmd.ExecuteNonQuery()
        'If (i > 0) Then
        'lblMsg.Text = "Record is Successfully Updated"
        ' lblMsg.Text = "Record is not Updated"        
        'End If        
        con.Close()
    End Sub