@vasanth
Welcome to the forum.
We need a touch more info if you don't mind. What phone (iPhone, or other, and which model, running what OS). Your MacBook Pro is running which OS and is how old (or new).
Is it just a Bluetooth problem—for example have you tried to connect via USB? And, I presume, when you do connect, you are wanting to sync with iTunes?
Help us out and we'll do our best to assist.
Ian