log4net eventlogappender doesn't log after deploy in windows server 2012

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log4net

I have implemented log4net in wcf service and using eventlogappender, its all working good in development region, when I deploy to test environment, eventlogappender is not working, but smtp appender is working fine in test environment. I searched online for solution and came across permission problem, I gave Network Service, Anonymous Logon, IIS worker process full rights to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Eventlog folder. But still it not logging

I followed log4net internal logging.

<appsettings>
        <add key="log4net.Internal.Debug" value="true" />
    </appsettings>

<system.diagnostics>
        <trace autoflush="true">
            <listeners>
                <add>
                    name="textWriterTraceListener" 
                    type="System.Diagnostics.TextWriterTraceListener" 
                    initializeData="C:\tmp\log4net.txt" />
            </add></listeners>
        </trace>
    </system.diagnostics>

When I deployed to test system with updated config. it never wrote to that file. I also gave same permissions to that file.