Problems with games/ports on Risc OS

I’ve found a couple of games that are supposedly working on Risc OS 5 but they won’t work on my Pandaboard ES setup:

-Nethack, ported by Jeffry Lee. It causes an exception and quits.

-Hheretic, with provided HERETIC.WAD or HERETIC1.WAD on the app directory. No errors: it just doesn’t do anything.

And, as I have said in the Pandaboard booting thread, every SDL game/port has broken crackling sound, even with the latest drenderer library installed.

thanks