Problem to create a sheetmetal from a surface

Hi,

In portuguese:

quando crio uma superficie com 6 faces usando loft para efeito cónico, ou seja, uma superficie tipo omega cónico, dependendo do lado para que quero a espessura da chapa. Dá valor errado no planificado.

google translate:

when creating a surface with six faces using loft to effect conical, ie a type omega conical surface, depending on which side they want to plate thickness. It gives the wrong value planned.

I'm very upset because I trusted in solidworks and now I can lose my job.

See fotos:

I use solidworks 2009, can someone say if this problem is fix at recent versions?

Thanks

SolidworksSheet Metal