aiuto problema renderig con autocad 2008

[Alex81]

Hello, everyone.
I want help because I can't make cylinders in the window of making everything black . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Does anyone give me a hand since I have a brief exam? thank you very much

 

[Shape]

Hello, everyone.
I want help because I can't make cylinders in the window of making everything black . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Does anyone give me a hand since I have a brief exam? thank you very much

try to post the file here, so it seems that the cylinders are not such, but it seems strange