Oscillator/Hserout woes

[HankMcSpank]

Need a sanity check here!

I've been runing on an external 20Mhz resonator ....HSEROUT worked fine.

now want to go with the PIC's 4Mhz internal oscillator (to free up a couple of pins)...but no matter what I do, HSEROUT is garbage.

I'm using MPASM... the16F690inc file has a couple of options that I'm not clear about...

_INTRC_OSC_NOCLKOUT
_INTOSC

...could someone tell me why two options that look similar? (I've tried both....but sticking with _INTRC_OSC_NOCLKOUT )

Anyway, back to my problem....

@ __CONFIG _FCMEN_OFF & _INTRC_OSC_NOCLKOUT & _WDT_OFF & _MCLRE_OFF & _CP_OFF & _IESO_OFF & _BOR_OFF & _PWRTE_OFF

DEFINE  OSC 4          ' set Oscillator at 4Mhz.

DEFINE HSER_RCSTA 90h ' Enable serial port & continuous receive
DEFINE HSER_TXSTA 20h ' Enable transmit, BRGH = 0
DEFINE HSER_CLROERR 1 ' Clear overflow automatically
DEFINE HSER_SPBRG 25  ' 9600 Baud @ 4MHz, 0.16%
SPBRGH = 0
BAUDCTL.3 = 1         ' Enable 16 bit baudrate generator



Include "modedefs.bas"

ANSELH=0
ANSEL=0
CM1CON0 =0
CM2CON0 =0
CM2CON1 =0
adcon1=0
TRISB.6 = 1
TRISB.7 = 0
TRISC=%00000000 ; set all Port C pins as outputs
rcsta.7=1 'SPEN serial port enable bi


loop1: 
hserout ["hello", 13, 10]
pause 250
goto loop1
end

Grateful for any input here....I'm going crazy looking at this problem for hours!

Edit: Just rolled back to the external 20Mhz resonator oscillator - Hserout works just fine - could it be the internal oscillator is out of spec & therefore wrong after being divided down?