3D mesh problem

sphinx

hi, i have modeled a 3d structure (mesh) in gambit using vertex>joining them>creating different faces but when i want to use it in fluent, fluent rejects it showing the following message:

Error: no cells in zone, id = 0, ind1 = 1, indn = 0Reading Cells: failed while reading section 12.

Clearing partially read grid.

here is the mesh file,it would be greatly appreciated if anyone can tell me what's wrong: http://www.filefactory.com/file/a345d1/n/bap1122_msh

sphinx