You want that all your virtual guest's can communicate via virtual NIC's? You can use VMware Server's VMnet1 (host-only) network for this purpose.
What is your host operating system (the one where VMWare Server runs on)?
I have win2k server on physcial machine (host) on that i have installed vmware server, under vmware server i have 2 to 3 vm's of windows professional and linux , both vm's have configured with virtual nic , but both are not able to communicate each other
Please post "ipconfig /all" (Windows) and "ifconfig -a" (Linux) for all guest's AND the host.
Please post the guest's .vmx file.