I know how to send data to hyperterminal through the help of SOR tutotials
but unable to get data from hyperterminal to mcu.
Oh, so you are receiving data then with no problem? I misunderstood you before . . .
If I read you right, your problem is now transmitting back to the Atmel with Hyperterminal?
Typing anything into Hyperterminal will automatically transmit it on the Tx line. By default, you can't see what you type, but it gets sent. There is an option to change that default setting.