When you issue a PING command, you may receive either of the following:

<b>PING: transmit failed, error code 10050

PING: Transmit failed, error code 65.</b>
This failure is generally the result of having a firewall program blocking the PING or blocking ICMP Echo and/or Echo Reply packets.

Check your program documentation for how to allow the PING command or to allow ICMP Echo and/or Echo Reply packets.