Hallo, I'm new in Maya.

In Maya 7 I have projected an image onto a geometry. This image is saved as a .tga with an alpha to separe this element from the background elements, but it doesn't work as seen on this Picture:
Where can I tell Maya to use this alpha?


Later I've tryed an second way: I have used an layered shader with my imageprojection and an separate alpha and it looks very bad also:
can anyone please help me?


Sorry for my English