ActionScript 3.0 :: Not Receiving COMPLETE Event In URLLoader?

I'm querying a web application in a remote server through XML files and receiving answers in the same file format. Until now, sometimes I received a connection error:

Error #2044: Unhandled ioError:. text=Error #2032: Stream Error. URL: http://server/Services/startSesion.com
at reg_jugadores_fla::MainTimeline/queryGQ()
at reg_jugadores_fla::MainTimeline/reg_jugadores_fla::frame1()

When this occurs, trying to access the services through a web browser, there's a test page where you can try queries, returns a "500 Internal server error". I managed that problem adding a listener to catch the error:

xmlSendLoad.addEventListener(IOErrorEvent.IO_ERROR , catchIOError);

But since yesterday I can't connect anymore using Flash while it's possible to access the test page. I'm not able to talk to any support guy as the company is closed for vacations! I added listeners to try to know what's happening and this is the result in the output window:

openHandler: [Event type="open" bubbles=false cancelable=false eventPhase=2]
progressHandler loaded:154 total: 154
httpStatusHandler: [HTTPStatusEvent type="httpStatus" bubbles=false cancelable=false eventPhase=2 status=200]

AFAIK, status=200 means OK but why the COMPLETE event isn't dispatched?. So, is there anything I can do or just wait until the tech guys return from the beach?

/************************************************** ********/
queryGQ(sessionURL,sessionQS); // Start session
stop();
/************************************************** ********/

[code].....