After release of the new ingame overlay version (RTST Beta) I was not able to see any achievements or ingame overlays and there was only one known fix:

1. Launch RTST under Admin mode.
2. Launch PS2 under Admin mode.

but if player uses steam version of the PS2, there was no known way to launch game under admin mode. By this way RTST was only working audio/voice only, but anything else like visual ingame things where not coming up.

There is way to go around the steam issue if you:

1. Launch RTST under Admin mode.
2. Force PS2 run under Admin mode (out of steam) by:
a) Navigating ...\Steam\SteamApps\common\PlanetSide 2
b) Launch "LaunchPad.exe" under Admin mode.

I confirmed that this will fix all the issues (you see achievements, ingame overlay, get audio messages etc.)

But now as new 64bit client came out that trick is not working anymore.

1. Launching game under admin mode "LaunchPad.exe" will fix the issue, if people where running the game under steam.
2. If you launch the game while RTST is running (Auto mode/ x64 mode) will CTD your game.
3. Will give you in top RTST little D3D Com. Error.

I confirmed that D3D was causing the CTD, I just Disabled all Ingame overlays under Overlay menu and Options, I'm no longer getting CTD.

I hope it helps.