VIX_SERVICEPROVIDER_VMWARE_WORKSTATION error

Hi,

I'm trying to run a script in a 64-bit Windows 7 VM usingthe vmrun command line tool (1.6.0.2073) and the following options:

vmrun -T ws -gu user -gp passwordrunProgramInHost "C:\vms\W7.vmx" -interactive "C:\test\test.cmd"

and i get the following error:

Error: Service type VIX_SERVICEPROVIDER_VMWARE_WORKSTATION was specified, but not installed

Can anyone help me with this error, it would be most appreciated!

Thanks