PICKit 2 USART

[DragonBall_6]

Hi

I had added in the Define as below. I'm using PIC16F877A and 4 MHz.
I enter "a" and click send. There are nothing echo back. "a" only show once when the echo button is checked.
Any idea???

DEFINE OSC 4

DEFINE HSER_RCSTA 90h
DEFINE HSER_TXSTA 20h
DEFINE HSER_BAUD 9600
DEFINE HSER_SPBRG 6
DEFINE HSER_CLROERR 1

datain VAR BYTE

main:

     HSerin [datain]
     HSerout [datain]
     
GoTo main

Any suggestion ???

Thanks

Peter