ActiveSync doesn't work after upgraded SBS tp 2003 R2 1

[msworld]

ActiveSync doesn't work after upgraded from windows sbs 2003 to 2003 R2. This is the event error:

Event Type: Warning
Event Source: Server ActiveSync
Event Category: None
Event ID: 3033
Computer: SERVER
Description:
The average of the most recent [200] heartbeat intervals used by clients is less than or equal to [540]. Make sure that your firewall configuration is set to work correctly with Exchange ActiveSync and direct push technology. Specifically, make sure that your firewall is configured so that requests to Exchange ActiveSync do not expire before they have the opportunity to be processed. For more information about how to configure firewall settings when using Exchange ActiveSync, see Microsoft Knowledge Base article 905013, "Enterprise Firewall Configuration for Exchange ActiveSync Direct Push Technology" (

http://go.microsoft.com/fwlink/?linkid=3052&kbid=905013).

We don't have ISA. We usesWGR614 wireless router connecting to the Internet.

Bob Lin, MS-MVP, MCSE & CNE
How to Setup Windows, Network, VPN & Remote Access on

http://www.HowToNetworking.com

Troubleshooting Network, VPN & Remote Access on

http://www.chicagotech.net

 

[TechSoEasyMVP]

Bob,

To resolve this, follow the steps outlined here:

http://snipr.com/1xts3

Jeffrey B. Kane [MVP - Small Business Server]
TechSoEasy

http://www.techsoeasy.com

Blog:

http://techsoeasy.spaces.live.com