forced subtitle problem in avi.net with dvd rip of main movie only with dvd fab 5.

Movie ripped from DVD with DVD Fab 5, movie only and all subtitle streams left in (also tried it with only english selected)

Avi.net indexed using index.net (also tried it not using this step)

Attempt to select one of the english subs streams and then forced subs but heres the problem

THe forced subs optino does nothing, the avi.net simply reselects perm subs and displays all the subs - i.e. even for english translation of people speaking english. What im after is the option to only display forced subs - i.e. for when the dialog on screen is not in english. How do i get avi.net to allow me to select this option?