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 ?