From the information you have posted, it is not certain what is causing the problem.
I presume that the subnet masks are the same ? Are these 255.255.255.0 ?
You have checked the cables ?
Are there any other devices on the network ? Are you certain that these IP addresses are not in use on other devices on the same network ?
Have you also configured the default gateway to be the IP address of your router ? Even if you don’t have a router, you need to configure the gateway, as a lot of IP stacks do not work correctly.
You may also have firewall software that prevents the PING. Try disabling it and see if it now works.
When you say “I can ping the workstation from server but not from workstation.”, do you mean you can PING the workstation from the server, but not the server from the workstation ? Or can you not PING the workstation from itself ?
Please post some more information, and I will try to help you further.