You might want to double check that you are setting the hardware communication correctly. I have used the code below to set the HSEROUT/HSERIN for the 18F4550. You might want to check the correct settings for the 18F26K83. I have never used that chip before. The Mr. E calculator was helpful to me.

Code:
'####### MR. E CALCULATOR SETTINGS #########	
DEFINE HSER_RCSTA 90h       'ENABLES SERIAL PORT		
DEFINE HSER_TXSTA 20h       'ENABLES TRANSMIT
		
DEFINE HSER_CLROERR 1       'Hser clear overflow automatically 		

SPBRG = 25
SPBRGH = 0
		
'DEFINE HSER_SPBRG 25        '115200 BAUD
		
BAUDCON.3 = 1               'ENABLE 16 BIT BAUDRATE GENERATOR