your not paying attention the solution has already been offered , and for an issue like this its important to include the config section
config + program are inseparable for diagnosing this problem

Code:
define osc 48
TRISB = $00 ' Set digit pins to output 
mainloop:
toggle portB.5 
pause 200 
Goto mainloop ' Forever

End
RTFM

;wrong define osc 48 DEFINES ARE CASE SENSITIVE
define OSC 48