After a reboot my server cannot ping any other server

[TechieAdmin]

After I reboot my 2003 email server I cannot ping our other server. however the other server can ping it, only by enabling the second nic and configuring it with the old ip address and disabling the other nic does it start to work again.

I have tried a hub and a 1gb switch all with the same issue

 

[ramsman]

Have you cleared the arp on your switch and and other machines? Have you changed the NIC on the server?