i have developed a game for Nokia 7650.the game is running fine.

problem is---- when i get a call on my device while playing the game.
,it goes into paused state (thx to Appliction managemant software)
but as i start playing again everything goes fine.once i exited from the game,and try to start the game again .This error comes ---Application system error !----. i have no other option but to restart the device.then evrything goes right.

please help me to debug this error.
thx.