Problems making a part

Hello everybody,

friday I received an autocad file with dimentions so I could make a 3D model of it in Solidworks. For the DWG file see the attachments.

I have tried by best to make the model but I can't draw something. On the Milling plan you can see the 1.6° variation in thickness, where it goes from 12.51mm to 10.88mm.

I searched all over the web and this forum, but I can't find a solution.

I use Solidworks 2012.

EDIT: if you cannot open a DWG or Solidworks file, I added 2 PDF examples of the files.

Thanks in advance

SolidworksParts And Features