Subtitle does not work in ATV2 home share

Hi everyone, I've been fighting with the subtitle problem with ATV2 and iTunes home share for the last 4 days and spent over 20 hours try to resolve this.

All subtitled files works perfectly on QT Player, iTunes, both on PC/OSX

Some background info to help
-srt file, both uncleaned and cleaned by SubCleaner
-subtitle will show up when pause/play or starting from 0 sec
-if no subtitle to load for ~5 sec, subtitle grey bar disappears and subtitle does not load
-however, if you pause and play again, it will load that portion, only to disappear and not load again.
-tried sharing both from windows/osx
-ATV setting tried, subtitle default English or none, CC option on/off, audio default english or none

version created, none worked properly on ATV2
-m4v/mp4, handbrake, external srt, full processing mode
-m4v/mp4, subler
-m4v/mp4/mov, iSubtitle, both simple save and save as self-contained
-m4v/mp4/mov, Submerge, save as self-contained (advertised as hardsub, but does not, seems to add a seperate stream into mov file)

Greatly appreciate if someone can point out a sure fire way to add subtitle for ATV2. Thanks

I'll have to return ATV2 if this doesn't work out...sigh.