haze problem

in the afternoon and morning daylight hours the haze in fs2004 looks fine. But at dawn and sunset when the haze meets the ground and the ocean, it becomes just a flat line. It looks really annoying when that happens. And if i put the time back 2 the daylight hours, the line is still there and the haze isn't realistic no more. I'm using a geforce 4 4200 and the latest official drivers. Does any1 know how to solve this problem?yeh and i also have all my graphics settings 2 the highest except for scenery mesh.