First time trying to UV Map a model and edit the texture map.

I am trying to make a simple top for poser.  I have uv mapped the top.  For some reason, there is a big void zone in the middle of the model, where the UV map has horizontal gash lines instead of the squares that match the model mesh.  In the uv mapping programs, that zone is nowhere near the edge.

I made the model in Carrara.  I have tried UV Mapping it in UV Mapper classic and in Carrara itself.  Same results.

I have tried just about every possible command in UV Mapper classic and Carrara.  There must be an order to do things in, or a box that needs to be checked or unchecked, or something. 

I attach a picture of the uv map projected to the model.