Serial port settings for given crystal

[Scampy]

Just need some guidance on setting up the defines for serial communications when using a particular crystal.

I'm using a 20 mhz crystal.

Here are my config settings

ASM 
  __CONFIG    _CONFIG1H, _OSC_HS_1H
  __CONFIG    _CONFIG2L, _PWRT_ON_2L  
  __CONFIG    _CONFIG2H, _WDT_ON_2H & _WDTPS_512_2H
  __CONFIG    _CONFIG3H, _MCLRE_ON_3H & _LPT1OSC_OFF_3H & _PBADEN_OFF_3H  
  __CONFIG    _CONFIG4L, _LVP_OFF_4L & _XINST_OFF_4L
ENDASM

I've cut and pasted code from a previous project but that won't allow connection with the port.

DEFINE HSER_BAUD    115200        ' Hser baud rate 
DEFINE HSER_RCSTA   90h           ' Hser receive status init 
DEFINE HSER_TXSTA   20h           ' Hser transmit status init 
DEFINE HSER_CLROERR 1             ' Hser clear overflow automatically 
DEFINE HSER_SPBRG 25  ' 115200 Baud @ 40MHz, -0.22%
SPBRGH = 0
BAUDCON.3 = 1         ' Enable 16 bit baudrate generator
ColumnWidth CON 10

I've tried changing the baud rate to 9600, and different values for SPBRG as I'm not running the PIC at 40Mhz...

Any help would be appreciated

Malcolm