Rectangularlightlocator And Maya -prompt

Hi... How to create a rectangularLightLocator node in maya -prompt?

In maya GUI:
loadPlugin Mayatomr
createNode rectangularLightLocator
// Result: rectangularLightLocator1 //

In maya -prompt:
loadPlugin Mayatomr
Warning: Unrecognized node type 'rectangularLightLocator'; preserving node information during this session.
Result: unknown1

Why??... Thanks a lot...