DHCPCD not working

[desperado618]

I am directly connected to my DHCP server. My installed OS as well as Knoppix, BT3, and other Live CD's work fine..However whenever I try to get an ip address from Backtrack2 the interface shuts down.

I first turn on the interface:
ifconfig eth0 up

I confirm that the interface is up and then run:
dhcpcp eth0

I open tcpdump on both my pc and my dhcp server. I see the dhcprequest go out and I see my server make an offer. I never see the offer in my dump on the pc and then the interface shuts down.

Everything works fine if I manually assign an IP.

Any assistance will be greatly appreciated.
Thanks in advance.

[imported_harry]

Not sure if it is a typo in your post but the command should be dhcpcd eth0

Reckon it's a typo, as the title of the thread has it right but thought I would point it out just in case.

[alienstargate]

is there a fireweall enabled ?