Why are you trying to "import" them? You cannot import a normal VMware created Virtual Machine via the Import Command, its for VM's created in Parallels Desktop, Microsoft Virtual PC, as well as virtual machines using the Open Virtualization Format (OVF).
All you need to do is simply copy/move the Virtual Machine Package to where you want to run it from, the default is "~/Documents/Virtual Machines" and ensure you have proper permissions if it does just run by double-clicking the Virtual Machine Package you copied/moved to its new location.