The guest operating system is not Mac OS X Server

Hello,
I want to run VMware on my MAC, but I have this message which will turn off my machine. I have tried to run in many different ways, but the same error message box pops up. Is not compatible VMware with my MAC ? Should I download another version of VMware ?
Thank you !

The guest operating system is not Mac OS X Server.
This virtual machine will power off.
OK
