Stuck at Research room / missing crate

[damnedcyanide]

Hi. So I have this problem that I shoucl kill infected with hanging box, problem is that box is missing. I tried killing zombie with another way but story won't progress. I've tried to restart game and load different save.
Here is picture

http://s1360.photobucket.com/user/cyanii...b.png.html

[jens]

If the game is from Steam do a file integrity check on the game in the Steam client and see if that helps.