I am making a qauadrotor.
Iam using the following Esc's
http://hobbysea.com/index.php?cPath=15&sid=b916ced009d806f0f39499b63c4cbd11
The Problem is that one of my esc's heated up when i connected it to the brushless motor. And the motor stopped working. Later when i replaced the Esc's with another ESC it worked fine for a certain duration but after a while that esc's also started heating up and the motor stopped running.

I wanted to ask Why is my ESC getting heated up and blowing off . and why do ESC 'S BLOW up ..

What motor are you using...?
May be because of the high current draw of motor...
Or check your connections...