Gmax and effects

Hi,I'm creating a ship in gmax. And I'm using attached efects for lights. I created new effects which are visible from approx 10nm but they behave somehow strange.1) If I start FS somewhere around the ship (up to 5nm) I can fly away and still see the lights. But if I start in greater distance and closing to the ship, no lights appear, everything is dark, the effect is not initiated.2) I have each light (effect) twice, one for DAY=0;NIGHT=1; second for DAWN=1;DUSK=1;. And some lights appear only either at night or in the evening/morning. It depends on the situation which came first. If I load the flight and set dusk, the lights are on for the evening but not at night. If I set night first, lights are on only at night, not in the morning. Reloading the flight is not sufficient to change which effect will be started, I need the restart whole FS. And it happens only for some lights, not for all.Does anybody know how effects really behave. What can be the reason.