Log4net - object reference not set issue

I have 2 test and 1 production server.

In my global.asax file - I have this one line of code:

void Application_Start(object sender, EventArgs e) 
{
    // Code that runs on application startup
    Logging.ConfigureLogging();
}

On both test servers its working fine, but on the production server, its generating an object 开发者_如何学运维reference not set exception. Any ideas on what in the production environment could be causing this error?

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Turns out the "highly skilled support guys" installed it to a virtual directory of MOSS... Guys - nothing co-exists with sharepoint...