AVR-Chat

hi!

i'm new here. i need your help. i'm currently having a project on 
avr. i would like to communicate data from pc to microcontroller. 
the transmitter is connected to the pc through serial port. and the 
receiver is connected to the microcontroller. I used atmega16.

when i programmed the atmega16, I tested it. when i applied source 
to it, after a while, the leds light up..it formed different 
combination.so i assumed that the receiver receive data. however the 
problem is there is no transmitter yet. here's the link for my code:

 http://h1.ripway.com/greenadik_101/uarttest16.c

so i edited my program. i added an end character. here's the code:

 http://h1.ripway.com/greenadik_101/uart16.c

after that, leds doesnt light up. so i send data from pc. the 
problem is it doesn't work at all.

is my program the problem?