Mental_ray reflection map problem

[jordan23]

hello everybody. i've got a serious problem with mental ray. when i put a reflexion map in the glossiness map i have some very diffuse noise over my object. if i take it off the material it's ok. but the strange thing is that when i put the reflexion map and fire up the glossy samples, they doens't respond. i could put even 256 glossy samples and it's the same! hope some one could help.
in the scene i have a simple photometric light and visible shape is turned off

thanks guys

[MrCAD]

you can post your file and maybe someone can find a clue to your problem

MrCAD