ZBrushCentral

Problem in rendering displacement map in maya with GUVtiles from Zbrush

Hey There

I’m having a problem rendering a model from zbrush in maya thats has a GUVtiles . displacement map … the color texture and the normal map are good . but the displacement map has a black lines in some particular places in the render …
i have a picture so u can see what i mean

http://yfrog.com/42245vj

Any help will be appreciate

Thank you

???