usart not workin

[parinshah]

USART isn't working because you're not using it.

Compare the commands you have used against the PICBasic manual to discover what you have doen.

thank u very much for ur kind concerns madam.i got ur point but this is how the serial i/o r define in manual(serin pin,mode[qualifier][item])
my syntex is
serin portc.7,t9600,[0],{bo}
wherin b0 is a variable wher byte vl b stored after the start bit(0) detected on rc7 pin.kindly reply what is the mistake.