Expert On SQL Queries Needed For Help Updating Record.

Hi, I need help with updating a record. When I run the following code underneath the update button, the record does not update and I get no error message. Anyone have any ideas?





Code Snippet

Dim ListingID As String = Request.QueryString("id").ToString
Dim Description As String = DescriptionTB.Text
Dim PlaceName As String = PlaceNameTB.Text
Dim Location As String = LocationTB.SelectedValue
Dim PropertyType As String = LocationTB.SelectedValue
Dim Price As Integer = PriceTB.Text
Dim con As New SqlConnection(ListingConnection)

Dim sql As String = "Update Listings SET Description = ?, PlaceName = ?, Location = ?, PropertyType = ?, Price = ? WHERE ListingID = ?"
Dim cmd As New SqlCommand(Sql, con)

cmd.Parameters.AddWithValue("Description", Description)
cmd.Parameters.AddWithValue("PlaceName", PlaceName)
cmd.Parameters.AddWithValue("Location", Location)
cmd.Parameters.AddWithValue("PropertyType", PropertyType)
cmd.Parameters.AddWithValue("Price", Price)

Try
con.Open()
cmd.ExecuteNonQuery()
con.Close()
Catch ex As Exception