http://support.microsoft.com/?kbid=316414

"Ping: Transmit Failed, Error Code 65" Error Message When You Attempt to Ping Another Computer
The information in this article applies to:
Microsoft Windows XP Home Edition
Microsoft Windows XP Professional

This article was previously published under Q316414
SYMPTOMS
When you attempt to verify network connectivity with another computer on the local network or on the Internet by using the TCP/IP Ping.exe command-line utility, you may receive a command-line error message similar to the following:

Ping: transmit failed, error code 65
CAUSE
This behavior can occur if the following conditions are true:
The Internet Connection Sharing (ICS) feature is enabled.

-and-
Firewall software from Zone Labs such as ZoneAlarm or ZoneAlarm Pro is installed on the computer.

-and-
The ZoneLabs program is not correctly configured for ICS.
RESOLUTION
To resolve this behavior, do one of the following as appropriate to your situation:
Configure ZoneAlarm for ICS support. Please consult the program documentation or see the Zone Labs Web site for more information about how to configure ZoneAlarm for ICS. -or-


Remove the Zone Labs firewall software from the computer. Please consult the program documentation or contact Zone Labs at the ZoneLabs Web site for more information about how to do this.
MORE INFORMATION
For support for ZoneLabs products, see the following ZoneLabs Web site:
http://www.zonelabs.com/services/support.htm

For more information about ZoneAlarm or to contact ZoneLabs, see the following Zone Labs Web site:
http://www.zonelabs.com

The third-party products that are discussed in this article are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, regarding the performance or reliability of these products.

Microsoft provides third-party contact information to help you find technical support. This contact information may change without notice. Microsoft does not guarantee the accuracy of this third-party contact information.

For additional information about Internet Connection Sharing in Windows XP, click the article numbers below to view the articles in the Microsoft Knowledge Base:
310563 Description of Internet Connection Sharing in Windows XP

306126 HOW TO: Configure Internet Connection Sharing

237254 How to Enable Internet Connection Sharing on a Network Connection

For more information about home networking and Internet Connection Sharing in Windows XP, see the following Microsoft Web site to view the Microsoft Support WebCast:
Support WebCast: Home Networking and Internet Connection Sharing in Microsoft Windows XP

For additional information about how to troubleshoot TCP/IP Connectivity in Windows XP, click the article number below to view the article in the Microsoft Knowledge Base:
314067 How to Troubleshoot TCP/IP Connectivity with Windows XP