รบกวนพี่ๆหน่อยครับ กดบันทึกแล้ว มันวิ่งไปหาตัว executenonquery vb.net

Public Class Frm_manag_coffice
    Private Sub btn_addnew_Click(sender As Object, e As EventArgs) Handles btn_addnew.Click
        If txt_add_id.Text = "" Or txt_add_name.Text = "" Or txt_add_hot.Text = "" Or txt_add_cool.Text = "" Or txt_add_spin.Text = "" Then
            msg_error("กรุณากรอกข้อมูลให้ครบ")
            Return
        End If
        If Not IsNumeric(txt_add_hot.Text) Or Not IsNumeric(txt_add_cool.Text) Or Not IsNumeric(txt_add_spin) Then
        End If

        If pic_add.Image Is Nothing Then
            SQL = "insert into coffee(coffee_ID, coffee_name, coffee_hot, coffee_cool, coffee_spin) values (@id,@name,@hot,@cool,@spin)"
        Else
            SQL = "insert into coffee(coffee_ID, coffee_name, coffee_hot, coffee_cool, coffee_spin, coffee_image) values (@id, @name, @hot, @cool, @spin, @img)"
        End If

        cmd = New SqlClient.SqlCommand(SQL, cn)
        cmd.Parameters.Clear()
        cmd.Parameters.AddWithValue("id", txt_add_id.Text)
        cmd.Parameters.AddWithValue("name", txt_add_name.Text)
        cmd.Parameters.AddWithValue("hot", txt_add_hot.Text)
        cmd.Parameters.AddWithValue("cool", txt_add_cool.Text)
        cmd.Parameters.AddWithValue("spin", txt_add_spin.Text)
        If Not pic_add.Image Is Nothing Then
            ''เพิ่มรูปภาพลงฐานข้อมูล
            Dim mem As New IO.MemoryStream
            pic_add.Image.Save(mem, Imaging.ImageFormat.Bmp)
            Dim pic_for_add() As Byte
            pic_for_add = mem.ToArray()
            cmd.Parameters.AddWithValue("img", pic_for_add)
        End If
        If Not cmd.ExecuteNonQuery = 0 Then
            msg_error("เพิ่มไม่สำเร็จ")
        Else
            msg_ok("เพิ่มสำเร็จ")
        End If