How to up the timeout setting to solve password reset portal error "Authentication gate timed out waiting for a challenge response"?

Hi Everyone,

We have the password portal up and running on one box and another server with FIM R2 and SharePoint 2010.  All is good with the exception that our end users typically get distracted during the password registration and/or reset process and receive:"An error has occurred. Please try again, and if the problem persists, contact your help desk or system administrator. (Error 3000) ".  The timeout kicks in after 5 minutes of inactivity in the browser.

The FIM Service log shows the following:

"Authentication gate timed out waiting for a challenge response".

I have confirmed that the default password portal web.config setting is <add key="SessionTimeoutInMinutes" value="20" />.  

We have also updated Microsoft.ResourceManagement.Service.exe.config per thisarticle to the following but with no luck:

<resourceManagementClient resourceManagementServiceBaseAddress="myAddress" timeoutInMilliseconds="600000" />
  <resourceManagementService externalHostName="myHost" dataReadTimeoutInSeconds="600" dataWriteTimeoutInSeconds="600"/> 

1. We did not update the Windows SharePoint Servicesweb.config setting per the article about since we are on SharePoint 2010.  
2. There is no NLB or firewall in front on this server.

If anyone has any solution to how to solve this on FIM R2/SharePoint 2010 please let me know.

Cheers!