Well, now you had me a little tiny bit confused. I was under the assumption that you are unable to switch between virtual machines, since your mks had been locked in to one VM when you power on. And you needed to power off the VM to access the second VM.
I can issue a restart guest or suspsened without issue.
Well, in case, can you elaborate your issue a bit more. Also do check if vmware tools are installed and up-to-date