ASP.Net site timing out

[alex_read]

Hi Everyone!!!

I've got an asp.net site which runs from IIS 5. On 4 customers sites, this site runs ok. On our main customers site, one of the pages takes a little while to process a request & times out - giving the user a "The page cannot be displayed" error message.

In the web.config file, and any timeout settings in IIS I can find, I've tried to set the timeout to an hour (a bit excessive, but I'm testing at the mo). These are the settings I've put in the web.config file:

<authentication mode="Forms">
	<forms name=".AFormName" loginUrl="WebPageName.aspx" 
protection="All" timeout="60" path="/" slidingExpiration="true" />
</authentication>

<httpRuntime executionTimeout="3600" />

<sessionState 
        mode="InProc"
        cookieless="false" 
        timeout="600" 
/>

In IIS, I've put these settings:

Web Site tab > Unlimited connections with a timeout of 3600 seconds.
Home directory tab > Configuration button > App options tab the session state reads 60 minutes and the timeout again 3600 seconds.

Is there another setting I've missed or another cause to this problem please?
Thanks,
Alex