Hey mackrackit, I think we've cracked it

Instead of just sending a '3' over from the transmit box which didn't work, I changed it to 'DEC:3' clicked send and the LED's lit for 5 seconds then went off as per the program below. Is that what I should type, DEC:1-9 or should it work on just sending '3'

Code:
 ANSEL   = %00000000    'Disable analog select so ports work as digital i/o.
CMCON0  = %00000111    'Disable analog comparators.
TRISA   = %00000000    'Set PORTA as OUTPUT.
PORTA   = %00000000    'Set PORTA pins all low.
TRISC   = %00000000    'Set PORTC as OUTPUT.
PORTC   = %00000000    'Set PORTC pins all low.

MYVAR  VAR BYTE 
 
MAIN:
PAUSE 250
SERIN2 PORTC.5, 16780, [DEC MYVAR] '2400 INVERTED
IF MYVAR = 3 THEN HIGH PORTA.5
PAUSE 5000
low PORTA.5
GOTO MAIN