RCM6710 external interrup issue

Hi all.
I have a problem with the external interrupt handling. I’ve ran the sample …\Samples\Interrupts\EXTINT.C But it registers for about 15…20 interrupts for each rising/falling edge of the input signal. I took the square signal from the pulse generator and have debouncing RC-filter (10k, 0.1uF) on inputs. Can anyone show me the working example of the external interrupt handler?
My hardware/software: RCM6710/RCM6760 modules, DC 10.70