I tried to put subtitle to the dvd

and i learn from here to use dvd lab pro and ifoupdate . what happen to me is everything went well until I try to use the chapter menu . when i tried to choose a chapter it'll go to the beginning and if i watch it on the computer it will freeze.

and for the font.... when i watch it from the computer it's kinda big ( i use size 26 ) but when i play it from the dvd player it's very small .

what can i do about these problems???

please help