enable Hyper-V on ESXi 5

hi
i have a dedicated server with hyper-V on. since two peoples cannot work on the server at the same time . i installed Vmware workstation and ESXi as a Vm.
i can access to the ESXi using another machine and manage it with vCenter and vSphere .
i read that it's possible to enable hyper-v on a vm with the ESXi. i tried a lot of solution but it didn't work
does anybody knows an effective solution
thanks