How To Manage Response From Task Node With Slow Internet?

I already tried which you suggest. My Task node like below : 

sub init()
    ?"Start - init()"
    m.top.functionName = "MakePostRequest" 'Roku execution skips this line in my case.
    ?"End - init()"
end sub

function MakePostRequest() 
    ?"Start - MakePostRequest"  'The call doesn't come here

   readdata = CreateObject("roUrlTransfer")
   data = "http://Domain:Port" 
   readdata.setUrl(data)

   readdata.SetMinimumTransferRate(1, 75)

   ? "data is " data
   m.port = CreateObject("roMessagePort")
   readdata.setport(m.port)
   readdata.gettostring()
   readdata.SetRequest("POST")

   request = readdata.AsyncPostFromString(data) 
   ?"request : " request
   while (true)
      msg = Wait(0, m.port) 
      statusCode = msg.GetResponseCode() 
      if (Type(msg) = "roUrlEvent")
         statusCode = msg.GetResponseCode()
         headers = msg.GetResponseHeaders()
         if msg.getresponsecode() = 200 then
            Response = msg.getstring()
            headers = msg.getresponseheadersarray()
            ?"Response : " Response
            exit while
         else
            m.top.isError = "true"
            m.readdata.asynccancel()
            exit while
         end if
      else
         ? "wait for data"
      end if
      end while
      ?"End - MakePostRequest"
end function  

I make a separate project for this but here also result is the same.

I have to do is stand there until there is a response. Because I created multiple Task nodes and every task node Depends on Each Other. Currently, your ways are happening like => Consider I used 3 Task node. so First It's 2nd Task node Response comes. After 3rd Task node Response comes then it's Run 1st Task node Response comes. But I need to run 1st, 2nd, 3rd wise.