Can't upload large files ASP.NET / IIS 6.2 - asp.net-mvc

Question

I can not upload large files. My page is base in ASP.NET.
In IIS I have 2 sites;
-1 for web service
-1 for web page
I try many ways that I found, but no work
Web service config;
////////////////////////////
<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<appSettings>
...
</appSettings>
<connectionStrings>
...
</connectionStrings>
<system.web>
<httpRuntime maxRequestLength="50097151" />
<compilation debug="true" targetFramework="4.5.2" />
<authentication mode="Windows" />
<pages controlRenderingCompatibilityVersion="3.5" clientIDMode="AutoID" />
</system.web>
</configuration>
////////////////////////////
////////////////////////////
Web page config;
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<system.webServer>
<handlers>
<add name="aspNetCore" path="*" verb="*" modules="AspNetCoreModuleV2" resourceType="Unspecified" />
</handlers>
<aspNetCore processPath=".\....exe" arguments="" stdoutLogEnabled="false" stdoutLogFile=".\logs\stdout" forwardWindowsAuthToken="true">
<environmentVariables />
</aspNetCore>
<security>
<requestFiltering>
<requestLimits maxAllowedContentLength="50741824" />
</requestFiltering>
</security>
</system.webServer>
</configuration>
I expect upload large files, but the actual is that I only can upload small files.

Answer 1

[HttpPost]
[DisableRequestSizeLimit]
public ActionResult uplo(string filename, string base64)
{
if (base64 != null && filename != null)
{
Models.filemodel archmod = new Models.filemodel ();
var xxx= archmod .namefunction(filename, base64);
return new EmptyResult();
}
return new EmptyResult();
}
It works with [DisableRequestSizeLimit] tag !!!