Most settings wont work with Xvid codec

hi, Currently I am using the Xivd codec because of its smallest file size and high quality but some region settings (such as window or fixed) will not work and I will get this error:

the specified device handle invalid. stop()

and then it will ask for the default compressor but when I hit yes it will give me the error again. does anyone have some help on making it work? any help will do.



-Greg