<configuration>
<system.web>
    <httpRuntime maxRequestLength="20971510" executionTimeout="120"/>
</system.web>
<system.webServer>
    <security>
        <requestFiltering>
            <requestLimits maxAllowedContentLength="2147483647" ></requestLimits>
        </requestFiltering>
    </security>
</system.webServer>
</configuration>