UVW Unwrap + Multi/Sub Object Problem

[Gorion]

Hi to everyone!!!!!

 

I have an object with 6 UVW Unwrap modifiers and the 6 A&D (mental ray) respective materials connected to a Multi/Sub Object.

I want add more Unwrapping materials, but when I try to show in the viewport the seventh material, 3ds Max shuts down. I cannot show more than 6 of these materials in the viewport:mad:.

I've tried the following solutions (none works):

-Changing the A&D Material for Standard.

-Checking other diferents maps.

-Making the maps size smaller and changing the format (from TIF to JPG).

-Applying these materials and modifiers to another different Edit poly.

-Changing the Unwrap modifier to UVW Map.

-I've change the render engine from MR to VRay and the material to VrayMtl and I've been able to render the object, but the materials haven't shown in the viewport.

-..... and others attempts which I don't remember.....

I use 3ds Max Design 2012.

 

Any idea to solve it????????

Thank you for your answers!!!!!!!