Star Trek TOS Season 1 Query

[bluwombat]

Have started watching this & just let me say how fantastic it is in BD - the re-mastering is a real treat. I so like also being able to see the original version on the same disc - just one small problem which I am hoping someone here may be able to help me out with. The instructions say u can flip from the original to the re-mastered version while you're watching it (i.e., in real-time) by pressing the 'Angle" (or pop-up menu) button on yr remote. Now this only seems to work sometimes - other times when I press the button it says "feature not available here".

Is anyone able to shed any light on this for me. FYI, I'm playing BD thru my Playstation & using the PS3 bluetooth remote. Appreciate any help...thx.