mentalray stops working... it just died

[myself44]

Hi
I encountered a weird problem, this morning I did some final rendering of my scene with mentalray just fine (1820*720)
after two renders (1 hour each), I closed Maya and did some post-prod in Photoshop. After that, I took a little break outside then this afternoon when I re-opened maya to do another shot of my scene, mentalray won't render anymore...

The preview render is fine, render perfectly. But when I click Batch Render,
it goes "Rendering with mentalray..." and it just sit there... for more than an hour now, so I cancelled it.
Normally, it goes "Mentalray rendering process 5%...10%..." but now it just jammed!!

I tried restarting Maya and the computer, but mentalray still freezes. I can't even render the occlusion pass.. batch render won't do anything..
What's going on?
Why it mentalray won't render anymore, it worked perfectly just a few hours ago...

Please help, I must hand in the project in two days and so far, Im pretty screwed :P

Thanks

[Kristopher_Lee]

Reboot number one.

Has Maya done a bad thing and kept MR from actually being loaded when you start Maya? I'd check in the Preferences, PluginManager that MRtoMaya(or Maya toMR) is still checked on loaded and autoload.

If that's not it, I really don't know.