Update a Ticket in VB

I have developed a number of links to FreshDesk API including Create Customer, Create Ticket, Read Companies / Contacts, Read Tickets but struggling to get Update Ticket to work.

Here is my Code

    Public uRequestUri As String = "https://xxx.freshdesk.com"
    Public sAPIKey As String = "[Our API Key]"
    Public uTickets As List(Of FreshDesk_Ticket)
    Public Class FreshDesk_Ticket
        Public id As Integer
        Public attachments() As Object
        Public cc_mails() As String
        Public company_id As String
        Public custom_fields As Object
        Public deleted As Boolean
        Public description As String
        Public description_text As String
        Public due_by As Date
        Public email As String
        Public email_config_id As String
        Public facebook_id As String
        Public fr_due_by As Date
        Public fr_escalted As Boolean
        Public fwd_emails() As String
        Public group_id As String
        Public is_escalated As Boolean
        Public name As String
        Public phone As String
        Public priority As Integer
        Public reply_cc_emails() As String
        Public requester_id As String
        Public responder_id As String
        Public source As String
        Public spam As Boolean
        Public status As Integer
        Public subject As String
        Public tags() As String
        Public to_emails() As String
        Public twitter_id As String
        Public type As String
        Public created_at As Date
        Public updated_at As Date
    End Class

Dim iJob = Integer = 7815 ' (This is an existing Ticket)
            Dim uTicket = New FreshDesk_Ticket
            With uTicket
                .status = 5
            End With
            Dim sResult As String = JsonConvert.SerializeObject(uTicket)

            Dim uFDConnection = New RestClient(uRequestUri)
            uFDConnection.Authenticator = New HttpBasicAuthenticator(sAPIKey, "")
            uFDConnection.AddDefaultHeader("Accept", "application/json")
            uFDConnection.AddDefaultHeader("Content-Type", "application/json; charset=utf-8")

            Dim uRequest = New RestRequest("/api/v2/tickets/" & iJobID.ToString, Method.POST)
            uRequest.RequestFormat = DataFormat.Json
            uRequest.AddHeader("Accept", "application/json")
            uRequest.AddHeader("Content-Type", "application/json")
            uRequest.AddParameter("application/json", sResult, ParameterType.RequestBody)

            Dim uResponse As RestResponse = uFDConnection.Execute(uRequest)

 It fails with the following error:

"StatusCode: MethodNotAllowed, Content-Type: application/json; charset=utf-8, Content-Length: 95)" Content: "{""message"":""POST method is not allowed. It should be one of these method(s): GET, PUT, DELETE""}" ContentEncoding: "" ContentLength: 95 ContentType: "application/json; charset=utf-8" Cookies: Count = 1 ErrorException: Nothing ErrorMessage: Nothing Headers: Count = 16 RawBytes: {Length=95} Request: {RestSharp.RestRequest} ResponseStatus: Completed {1} ResponseUri: {https://xxx.freshdesk.com/api/v2/tickets/7815} Server: "" StatusCode: MethodNotAllowed {405} StatusDescription: "Method Not Allowed"

If I remove the / between tickets and 7815 (the ticket number) I get this

"StatusCode: NotFound, Content-Type: application/json; charset=utf-8, Content-Length: -1)" Content: " " ContentEncoding: "" ContentLength: -1 ContentType: "application/json; charset=utf-8" Cookies: Count = 1 ErrorException: Nothing ErrorMessage: Nothing Headers: Count = 15 RawBytes: {Length=1} Request: {RestSharp.RestRequest} ResponseStatus: Completed {1} ResponseUri: {https://xxx.freshdesk.com/api/v2/tickets7815} Server: "" StatusCode: NotFound {404} StatusDescription: "Not Found"

Can anyone stop my error ?