RS232 sends to terminal but doesn't recieve!!

Hello every one

Im using Altera FPGA DE0 board and I need your help in serial communication

I use SOPC builder to design the hardware needed (that was a microcontroller

with rs232 prephiral with 2 pins used to send and recive)

I used Nios2 to write the code

first I tried to hyper terminal of the PC and it works

then I tried to receive by using "getc" function but didn't work

any ideas .. I need to send and receive .. so plz help

thanks in advance