Preferred renderer not available

Has anyone gotten this error?

"The Preferred render, Mental Ray is not available the Maya renderer will be used instead"

I'm using Maya 5.0.1. I had the error before and after I upgraded form 5.0 to 5.0.1. Anybody know anything?

I searched the forum to see if anyone else got this error when you start up Maya but didn't find anything, so sorry if it's already been posted somewhere.

Do you have the Mental Ray plugin enabled?

I didn't know you have to enable it in 5... I've looked in the render menu where it was in 4.5 and it's not there anymore. I've also looked in the plug-in manager but didn't see anything in the plug in manager that looked like a Mental Ray plug-in.
I'm sorry, I feel stupid. How do I enable it?

Int he plugin manager it's called Mayatomr

Thank you gmask for taking your time to answering my (and many others) question! I really appreciate it! If only you didn't know something about Maya, there might be a chance I could help you. Maybe Compositing or Matchmoving.
-Dave

No probs man.. jus tpass it on.. if you see a question you can answer from someone else please do or spend osme time reviewing another users work in the galleries. it's good karma!