This issue can be caused by one of the following:
1. Port 3101 is not open or is refusing outbound connections.
2. The Internet connection timed out.
The BlackBerry Enterprise Server is not connecting to the BlackBerry Infrastructure through the firewall.
Verify if the BlackBerry Enterprise Server connects through the BBSrpTest.exe utility.
1. Browse to C:\Program Files\Research In Motion\BlackBerry Enterprise Server\Utility\.
2. Run the BBSrpTest.exe file and look for a Successful response in the command prompt window.
3. If the command prompt window shows a failed message or a winsock error code, verify that your SRP credentials are correct.
4. If your SRP credentials are correct, contact your network administrator.
Note: Firewall port 3101 should be open for outbound initiated, bi-directional traffic.
The Network Access Node key in the Microsoft Windowsxxx174; Registry is set to an IP address or NetBIOS name other than localhost.
Modify the NetworkAccessNode value to localhost in the registry.
Warning: Modifying the computer registry can cause substantial damage to the Microsoft Windows operating system. Document and back up the existing registry entries prior to implementing any changes.
1. Click Start > Run and type regedit.
2. Browse to HKEY_LOCAL_MACHINE\Software\Research In Motion\BlackBerry Enterprise Server\Dispatcher\.
3. Change the NetworkAccessNode Value data field to localhost and close the Registry Editor.
4. Go to Control Panel > Administrative Tools > Services.
5. Stop and Start the BlackBerry Dispatcher