By default IIS will throw this error when an ASP page does not return within 90 seconds. For simple searches in the web reports, this should not be an issue. However, there are cases where a search will include a substantial amount of information and will need more time to process the request. The steps below explain how to increase the timeout:
IIS 6
* Open Internet Information Services (IIS) Manager in the "Administrative Tools" folder.
* Navigate to Web Sites - Default Web Site - EventSentry.
* Right-Click "EventSentry" or "Default Web Site" and select Properties.
* On the lower right, click the Configuration button.
* Click the Options tab.
* Adjust (increase) the value of ASP script timeout and click OK twice.
IIS 7
* Open Internet Information Services (IIS) Manager in the "Administrative Tools" folder.
* Navigate to Web Sites - Default Web Site - EventSentry.
* Double click ASP.
* Under Limits Properties increase Script Time-out value.
* Click apply (top right corner).