not able to get http response on proxy(wireshark)

we are getting the response on the debug console but..when we connect it to the proxy(wireshark) we get no response.
since i am new to this can somebody help.

Print "startA: "; campaign.vastTrackers.start
            For Each start In campaign.vastTrackers.start
                print "start: ";  trackRequest.SetURL(start)
               print "start"; trackRequest.GetToString()
            End For