September 15, 2008 7:56 PM

Are you on a Linux or Windows PC?

In case of a Linux PC you need to make sure
1) you don't have firewall rules to block the service
2) You have tftpd server installed and enabled.
3) and you have an empty file the tftp server directory (usually /tftpboot) with write permission for all (666) and /tftpboot directory also have at least 755 permission.

For Windows the same principle applies, you may need to debug the issue a little bit more.

Nachi