what's wrong 16F877A simple code?

[comwarrior]

checkleaf:
if portb.1 = 0 then
portc = brake
pause 500
portc = stmot
else
goto checkleaf
endif
return

checkopt:
if portb.2 = 1 then
portc = runmot
else
goto checkopt
endif
return

end

Actually, I was wondering if the GOTO's befor the ENDIF's were causing the problem, something like a stack overflow... then again i havn't looked to see how PBP codes the IF statements...