whenever i move a 3d object it leaves a shadow like things in my screen, so i always have to refresh it and it takes time what maybe the problem......i use 4PE+ and my os is win xp

This can be a problem with some graphics adapters - at least it used to be with older Intellicad versions. Try reducing hardware acceleration on your display adapter to see if it makes the problem go away. Go to Windows Control Panel>Display>Settings>Advanced and look around for the slider which controls hardware acceleration. Set it to the lowest value, then gradually increase until problems reappear.

tnx bro for the help........it works