Aync-queue full on one machine but not my laptop.

[Ed Landau]

Hello:    I posted earlier my first issue... here is me second :).

I have a multi-threaded C# application, developed with Visual Studio 2013, based on .Net 4.5.

I got NLog using Nuget.  I currently have the following installed: NLog,Version 4.2.0.

my NLog Config file looks like this: 

  <target name="asyncWrapper" xsi:Type="AsyncWrapper" queueLimit="20000">

            <target name="LogFile"

                xsi:type="File"

                fileName="C:\QRT\Logs\QRTLog-${shortdate}.log"

                layout="${date:format=yyyy-MM-dd HH\:mm\:ss.fff}|${level}|${threadid}|${threadname}|${event-properties:item=FromID}|${message}${exception:format=tostring} "

                concurrentWrites="true" />

   </target>

  <rules>

    <logger name="*" minlevel="Trace" writeTo="ColoredConsole" />

    <logger name="*" minlevel="Trace" writeTo="LogFile" />

  </rules>

Lots of NLog messages are missing. I know this because I implemented my own logger which is called ever time I call Nlog.

Enabling NLog internal trace, I see logs of Async Queue Full... but ONLY ON MY SERVER (Windows 2008 Server)... not when running on my Windows 7 machine (.NET 4.5.2 installed) 

Can someone help my understand why NLog has a queue which fills up and is not flushed?       There are tons and tons of these messages in the internal log file.

Thanks

-Ed