Import non-uniform mesh from fluent
 

I solve Lid-driven cavity problem by importing geometry and non-uniform mesh from Fluent into OpenFOAM. Unfortunately, result of velocity vector is not correct as shown in figure. We cannot see a vortex in the middle of cavity. Could you show me what wrong is?
http://i99.photobucket.com/albums/l2.../velvector.jpg

If I enlarge top region, we can see positive x-direction vectors, I think OpenFOAM may not be understood non-uniform mesh.
http://i99.photobucket.com/albums/l2...on/enlarge.jpg

Thank you very much.