Thanks Shah Dishant h.
But,I tried deleted all lcd commands and tried to send adding vrypwd(verify password) code at beggining of the program but the module did not work.
I actually connected TX And RX of R303 to TTL 232 and then Connected 2,3,5 of serial to 3,2,5 of 8051 module but it seems that it didn’t work out. Can u help me out with that.