Http Service #2032 error on adobe air

Hello.

We have an application that uses HttService to connect to the php script

It always works fine on my mac and on many other computers

but sometimes clients on win7 or win8 complain about #2032 error.

I have logs frome the last time client had the problem:

(mx.rpc.events::FaultEvent)#0

  bubbles = false

  cancelable = true

  currentTarget = (::HTTPOperation)#1

    argumentNames = (null)

    arguments = (Object)#2

    concurrency = "multiple"

    contentType = "application/x-www-form-urlencoded"

    headers = (Object)#3

    lastResult = (null)

    makeObjectsBindable = true

    method = "POST"

    name = (null)

    operationManager = (null)

    properties = (null)

    request = (Object)#4

    requestTimeout = -1

    resultElementType = (null)

    resultFormat = "object"

    resultType = (null)

    rootURL = "app:/CurationSoft.swf"

    serializationFilter = (null)

    service = (null)

    showBusyCursor = false

    url = "http://curationsoft.com/admin/licensecheck.php"

    useProxy = false

    xmlDecode = (null)

    xmlEncode = (null)

  eventPhase = 2

  fault = (mx.rpc::Fault)#5

    content = ""

    errorID = 0

    faultCode = "Server.Error.Request"

    faultDetail = "Error: [IOErrorEvent type="ioError" bubbles=false cancelable=false eventPhase=2 text="Error #2032" errorID=2032]. URL: http://curationsoft.com/admin/licensecheck.php"

    faultString = "HTTP request error"

    message = "faultCode:Server.Error.Request faultString:'HTTP request error' faultDetail:'Error: [IOErrorEvent type="ioError" bubbles=false cancelable=false eventPhase=2 text="Error #2032" errorID=2032]. URL: http://curationsoft.com/admin/licensecheck.php'"

    name = "Error"

    rootCause = (flash.events::IOErrorEvent)#6

      bubbles = false

      cancelable = false

      currentTarget = (flash.net::URLLoader)#7

        bytesLoaded = 0

        bytesTotal = 0

        data = ""

        dataFormat = "text"

      errorID = 2032

      eventPhase = 2

      target = (flash.net::URLLoader)#7

      text = "Error #2032"

      type = "ioError"

  headers = (null)

  message = (mx.messaging.messages::ErrorMessage)#8

    body = ""

    clientId = "DirectHTTPChannel0"

    correlationId = "C32429EF-ECF4-7A2E-31BD-AB45B6D993F5"

    destination = ""

    extendedData = (null)

    faultCode = "Server.Error.Request"

    faultDetail = "Error: [IOErrorEvent type="ioError" bubbles=false cancelable=false eventPhase=2 text="Error #2032" errorID=2032]. URL: http://curationsoft.com/admin/licensecheck.php"

    faultString = "HTTP request error"

    headers = (Object)#9

      DSStatusCode = 0

    messageId = "EB900331-B705-49FD-D82D-AB45B6F8EBF6"

    rootCause = (flash.events::IOErrorEvent)#6

    timestamp = 0

    timeToLive = 0

  messageId = "EB900331-B705-49FD-D82D-AB45B6F8EBF6"

  statusCode = 0

  target = (::HTTPOperation)#1

  token = (mx.rpc::AsyncToken)#10

    message = (mx.messaging.messages::HTTPRequestMessage)#11

      body = (Object)#12

        p = "cs2013"

        u = "marketconnexusLLC"

      clientId = (null)

      contentType = "application/x-www-form-urlencoded"

      destination = "DefaultHTTP"

      headers = (Object)#13

        DSEndpoint = "direct_http_channel"

      httpHeaders = (Object)#3

      messageId = "C32429EF-ECF4-7A2E-31BD-AB45B6D993F5"

      method = "POST"

      recordHeaders = false

      timestamp = 0

      timeToLive = 0

      url = "http://curationsoft.com/admin/licensecheck.php"

    responders = (null)

    result = (null)

  type = "fault"

it's not related to the service availability even not related to any pc antivirus software or firewall

we tried to turn them all off.

When problem exist we tried to ping required service and it's accesible...

Can someone suggest some solution? or way to go?