error while returning values from API after passing parameters

[Makumbi]

Please help am having a problem with returning values from webapi by passing parameters

Imports System.Data.SqlClient
Imports System.Net
Imports System.Web.Http

Namespace Controllers
    Public Class HandlerVBLoadtermController
        Inherits ApiController

        <Route("api/HandlerVBLoadterm/GetCustomersJSON/{customerid}/{customerid2}")>
        <HttpGet>
        Public Function GetCustomersJSON(customerId As String, customerId2 As String) As IHttpActionResult
            Dim customers As New List(Of Customer)()
            Using conn As New SqlConnection()
                conn.ConnectionString = ConfigurationManager.ConnectionStrings("KABOJJAConnectionString").ConnectionString
                Using cmd As New SqlCommand()
                    cmd.CommandType = CommandType.StoredProcedure
                    cmd.CommandText = "Gettermnew"
                    cmd.Parameters.AddWithValue("@p", customerId)
                    cmd.Parameters.AddWithValue("@s", customerId2)
                    cmd.Connection = conn
                    conn.Open()
                    Using sdr As SqlDataReader = cmd.ExecuteReader()
                        While sdr.Read()
                            customers.Add(New Customer With {
                              .Account = If(IsDBNull(sdr("Admno")), String.Empty, sdr("Admno")),
                              .Expressed = If(IsDBNull(sdr("Expressed")), String.Empty, sdr("Expressed"))})
                        End While
                    End Using

                    conn.Close()
                End Using
                Return Ok(customers)
            End Using
        End Function
    End Class


    Public Class Customer
        Public Property Account() As String
        Public Property Expressed() As String

    End Class
End Namespace

When i run this URL

http://192.168.14.205/KABOJJAAPPAPI/api/HandlerVBLoadterm/GetCustomersJSON/0782911364/Father

this returns Json data but when i runs this URL below with the ? operand it doesnot return any data

http://192.168.14.205/KABOJJAAPPAPI/api/HandlerVBLoadterm/GetCustomersJSON?customerid=0782911364&customerid2=Father

I get this error when i try to run it

"No HTTP resource was found that matches the request URI 'http://192.168.14.205/KABOJJAAPPAPI/api/HandlerVBLoadterm/GetCustomersJSON?customerid=0782911364&customerid2=Father'."

Below is my webapi.config details

Imports System.Net.Http
Imports System.Web.Http
Imports Microsoft.Owin.Security.OAuth
Imports Newtonsoft.Json.Serialization

Public Module WebApiConfig
    Public Sub Register(config As HttpConfiguration)
      ' Web API configuration and services
      ' Configure Web API to use only bearer token authentication.
      config.SuppressDefaultHostAuthentication()
      config.Filters.Add(New HostAuthenticationFilter(OAuthDefaults.AuthenticationType))

      ' Web API routes
      config.MapHttpAttributeRoutes()

        config.Routes.MapHttpRoute(
            name:="DefaultApi",
            routeTemplate:="api/{controller}/{id}",
            defaults:=New With {.id = RouteParameter.Optional}
        )
        config.Formatters.Add(New CustomJSONFormatter())
        ' Adding formatter for XML   
        ' config.Formatters.XmlFormatter.MediaTypeMappings.Add(New QueryStringMapping("type", "xml", New MediaTypeHeaderValue("application/xml")))
    End Sub
End Module