If you loose connection with vmware server (1,05 and 1,06 tested) and you're subnetting (like 255.255.255.192 and so forth in the mask), you will have to define NETWORK, and Broadcast. Example below:
auto eth2
iface eth2 inet static
address 200.200.200.73
network 200.200.200.64
netmask 255.255.255.192
broadcast 200.200.200.127
gateway 200.200.200.65
Its a good idea always to use these no matter what.