Thanx alot Mel, I use the battery to power up the circuit. It may be just does not provide enough current at first couple attempts. But this design suppose to be a portable unit, so i can't connect it straight to the 5V power supply. I also use to 4mhz crystal. I got the keypad and the lcd to work, also have the data to save into the memory bank. I am trying to send the data which i saved in the bank to the Serial out, by using TXREG. I tried a couple of different methods of serial out("serout, baudrate,[]", and "POKE TXREG") without any success. Do you have any suggestion?