Page Cannot Be Displayed error for long running process in asp.net 2.0

[sbhandary]

Hi,

I have an ASP.net page that takes over an hour and sometimes more to execute.

After the page has been running for 60 minutes, I get a Page Cannot Be
Displayed error. I have set the session timeout to 40 minutes and have the following java script to send mesg to server just to prevent timeout from occuring.

<script type="text/javascript" language="javascript">
function Reconnect(){
var img = new Image(1,1);
img.src = "New.aspx";
}
window.setInterval("Reconnect();", 600000); //Set to length required

</script>

This error occurs in IE 6 , but the page executes without a problem in Firefox.

I do not want to set the session timeout for more than 20 minutes,insted have the java script take care.
I would like to know what is actually causing the error and why is my script not working for IE.
Is it an IE setting that can be changed or something else?

Thanks,
Bhandary