Problem with animation

Hi, I have a problem with the animation. In obcject mode model looks ok but when I press P my model crush .
Here are screenshots of the problem
http://imageshack.us/photo/my-images/641/96382981.jpg/

http://imageshack.us/photo/my-images/812/14639232.jpg/

When I render the model also looks good
Thanks for any help.