Hi Tamil castor oil,

Firtst match the baud rate of your microcontroller board serial port with your PC serial-comm emulator.

Select timer 1 mode in 8 bit autorelaod mode
mov tmod,#21H
mov TH1,#0FAH ; If 11.0592 Mhz crystal is used
; and required baud rate is 9600 bps
mov scon,#0D4 ; mode1 8 bit variable baud
again: setb tr1
mov sbuf,#'5'
jnb ti,$
clr ti
sjmp again

end

First you try this let me know.
By

Veera Kannadiga