Chain breaks when animation is played I have made a chain of toruses, when I apply rigid body physics to it, it breaks as soon as I play animation.
I have tried scaling it up but does not help.
Please help me fix it.

Blender file is : https://drive.google.com/file/d/0B5aZVQjlGn3uem44NVFoZ040SFk/view?usp=sharing
Chain is in 2nd layer.
Try increasing the steps per second, and solver iterations
Or try increasing the weight of some of the links