IIS7 - The request filtering module is configured to deny a request that exceeds the request content length

I want to upload images, it works fine on my machine but when I put my website on IIS7 server for public I can't upload anything.

Error

> The request filtering module is configured to deny a request that > exceeds the request content length.

Most likely causes

> Request filtering is configured on the Web server to deny the request > because the content length exceeds the configured value.

Things you can try

> Verify the configuration/system.webServer/security/requestFiltering/requestLimits@maxAllowedContentLength > setting in the applicationhost.config or web.config file.

system.webServer in Web.config

  <system.webServer>
    <validation validateIntegratedModeConfiguration="false" />
    <modules runAllManagedModulesForAllRequests="true" />
	<security>
      <requestFiltering>
         <requestLimits maxAllowedContentLength="1048576" />
      </requestFiltering>
   </security>
  </system.webServer>

As you can see I set my maxAllowedContentLength to 1gb. Restarted my website and still getting this error. I made an /uploads/ folder on my file system where it suppose to be as well. Have no idea what causes this error and why I can't upload images.

<configuration>
    <system.web>
        <httpRuntime maxRequestLength="1048576" />
    </system.web>
</configuration>

From here.

For IIS7 and above, you also need to add the lines below:

 <system.webServer>
   <security>
      <requestFiltering>
         <requestLimits maxAllowedContentLength="1073741824" />
      </requestFiltering>
   </security>
 </system.webServer>

The following example Web.config file will configure IIS to deny access for HTTP requests where the length of the "Content-type" header is greater than 100 bytes.

  <configuration>
   <system.webServer>
      <security>
         <requestFiltering>
            <requestLimits>
               <headerLimits>
                  <add header="Content-type" sizeLimit="100" />
               </headerLimits>
            </requestLimits>
         </requestFiltering>
      </security>
   </system.webServer>
</configuration>

Source: http://www.iis.net/configreference/system.webserver/security/requestfiltering/requestlimits

I had similar issue, I resolved by changing the requestlimits maxAllowedContentLength ="40000000" section of applicationhost.config file, located in "C:\Windows\System32\inetsrv\config" directory

Look for security Section and add the sectionGroup.

<sectionGroup name="requestfiltering">
    <section name="requestlimits" maxAllowedContentLength ="40000000" />
</sectionGroup>

*NOTE delete;

<section name="requestfiltering" overrideModeDefault="Deny" />