I don't have access to mpg custom setting, when i click on custom button the custom window doesn't appear, i used to have access to it and i didn't install any new application, and when installing vegas on a fresh copy of windows xp it is the same, NO ACESS to the mpeg custom setting

i'm using vegas 4.0 (115)
windows 2k

and tried vegas 4.0c on windows xp pro

your responses are highly aprreciated