c# - unable to save log into windows azure table storage? -

i have used following code save trace log table storage. i'm using windows azure skd version 2.2

system.diagnostics.trace.traceerror("start log");  

also added listener in web.config

<system.diagnostics>     <trace>       <listeners>         <add type="microsoft.windowsazure.diagnostics.diagnosticmonitortracelistener, microsoft.windowsazure.diagnostics, version=2.2.0.0, culture=neutral, publickeytoken=31bf3856ad364e35" name="azurediagnostics">           <filter type="" />         </add>       </listeners>     </trace>   </system.diagnostics> 

also added code in webrole.cs

public override bool onstart()         {             startdiagnostics();             return base.onstart();         }          private void startdiagnostics()         {             diagnosticmonitorconfiguration dmc = diagnosticmonitor.getdefaultinitialconfiguration();             timespan tsoneminute = timespan.fromminutes(1);             // transfer logs storage every minute             dmc.logs.scheduledtransferperiod = tsoneminute;             // transfer verbose, critical, etc. logs             dmc.logs.scheduledtransferloglevelfilter = loglevel.information;             // start diagnostic manager given configuration.             try             {                 diagnosticmonitor.start("microsoft.windowsazure.plugins.diagnostics.connectionstring", dmc);             }             catch (exception exp)             {              }         } 

still getting error : 500 internal server error

can ensure have configured azure diagnostics correctly using instructions here. if still hit issue after retry can share storage account name (no keys please) configured , hitting error?