VRayMtl parameter resets when rendering

[Pixelo]

Hi all,
I have a very weird thing happening :
On one of my VRayMaterial, the Refraction Glossiness paramters reverts to 1.0 after each render.
I set it back to 0.85 for example, render is ok with the glossiness and when render is done, i go back to the material editor to see the value back to 1.0 !
Anyone had this weird behaviour before ? any idea ?
By the way it's a Polycarbonate material i downloaded on vraymaterials.de...
Thanks !

[Pixelcon]

Are you using SolidRocks by any chance? I also have had this problem when using the 'Interp. Gloss in IrrMap (if <=0.' function...

[Pixelo]

Hey you're right, it's a solidrocks issue :
http://solidrocks.subburb.com/index....809&Itemid=114
Thanks,