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disabling external interrupt

vico samana

i cant disable external interrupt,
i enabled exint0 in main, and in different function i want to use disable this interrupt and enable again
there is three bit related extrenal interrupt:
EX0=0 //disable exint0
EX0=1 //enable exint0
IT0=0 //level mode
IT0=1 //falling edge mode
IE0 : interrupt flag (automaticly cleared by hardware when interrupt serviced)
in main:

IT0=1;
EX0=1;
EA=1;//enable interrupts


in function:

EX0=0;//disable external interrupt
drawpic();// continue 5 second
IE0=0;
EX0=1;//enable external intrerrupt


but when drawing picture external interrupt continue to coming, where is the problem?

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