SSRS 2008 R2 errors uploading a large rdl file

I'm trying to upload a report defination file that is 3.6MB to SQL Server 2008 R2 SSRS server but I am encountering the following error.

"System.Web.Services.Protocols.SoapException: There was an exception running the extensions specified in the config file. ---> System.Web.HttpException: Maximum request length exceeded.   at System.Web.HttpRequest.GetEntireRawContent()   at System.Web.HttpRequest.get_InputStream()   at System.Web.Services.Protocols.SoapServerProtocol.Initialize()   --- End of inner exception stack trace ---   at System.Web.Services.Protocols.SoapServerProtocol.Initialize()   at System.Web.Services.Protocols.ServerProtocol.SetContext(Type type, HttpContext context, HttpRequest request, HttpResponse response)   at System.Web.Services.Protocols.ServerProtocolFactory.Create(Type type, HttpContext context, HttpRequest request, HttpResponse response, Boolean& abortProcessing)"

I have looked in both machine.config and web.configin both reportserver and Microsoft.NET folders but cannot find the "maxRequestLength" parameter that is mentioned in many postings about this issue. I am also reading that the default upload limit is 4GIG.

What am I missing?

Charles Mulwa