I am in the tunnel trying to deliver the xenon tissue sample to Gould. when i get to the end of the tunnel I go to the right and up the stairs right after my suit reboots and when i go up the stairs the screen fades to black but nothing happens after that. Just stays black and I cant proceed playing the game. I have returned the game for a new copy twice now. Any ideas? Am I doing something wrong?

I am in the tunnel trying to deliver the xenon tissue sample to Gould. when i get to the end of the tunnel I go to the right and up the stairs right after my suit reboots and when i go up the stairs the screen fades to black but nothing happens after that. Just stays black and I cant proceed playing the game. I have returned the game for a new copy twice now. Any ideas? Am I doing something wrong?

Is your problem similar to the one decribed in this thread ?
http://www.gamesas.com/forums/viewtopic.php?f=40&t=22534&p=250802#p250802

Also have a look at the videos that illustrate the "black screen" :
http://www.youtube.com/watch?v=kapWmaTrlNA
http://www.youtube.com/watch?v=lahnkOVnPis