Kennel Glitch (SPOILERS)

[Guest7]

When I get to the end of the dark hall way (with sequencing lights), I open the door and go into the room. First the frame with the dead guy flicks on and off, then the game goes to "load", and I have to start all over.
I can do all the things-- go to electrical box room, put crates along holes, go into kennels, hear the growling, see first dead guy fall, hear that voice talk, etc.
Earlier in the game I forgot to get the Iodine, could that be the reason?
I will re-start from a saved game and see how it goes.