Try this: switch your Preview window to use SreeD before trying to load anything into your scene. (Right click in the Document window and select SreeD).

If you can load and preview a model using SreeD, the problem is almost certainly related to your graphics card or driver. Back to Cap'n J.

"If I were a shadow, I know I wouldn't like to be half of what I should be."
Mr Otsuka, the old black tomcat in Kafka on the Shore (Haruki Murakami)