connection timed out (http://ipxe.org/4c116035)

[psavarma]

Hi
I've setup openstack on my ubuntu os and i've created some instances in the openstack gui.
now when i open the console of this instance, an error appears telling it is not able to boot from rom and asking me to boot manually..

so i press cnt+B for manual booting and it asks me to boot using ipex, i follow the commands given in http://ipxe.org/start, when i try chain http://boot.ipxe.org/demo/boot.php command for boot
i am getting connection timed out (http://ipxe.org/4c116035) error

please help me boot this

ps
i also got http://ipxe.org/err/2d0c20 error for show hostname and show filemane commands