HI all,

1- Mackrackit
it's not working where you place them but it's working when i do :
DEBUT:
ENABLE
...
...
...
DISABLE
goto DEBUT

2- Bruce
indeed it was a 'typo' mistake i will write : TMR0L=tmr0runon.Lowbyte

well, for now all is ok so i can go on

thanks for helping