Just mentioning "all CIOS" could get you killed over here. Also, the "all" makes me think you did something stupid already, as the "stuff we don't talk about" only needs 1 as far as I understood. So I guess you messed up your wii with something like iosCRAP already, overwriting all your IOSes with stupid versions.
Anyhow, DVDx only works for older Wiis, your Wii might be to new. You also need the right kind of DVDs:
[
wiibrew.org]
Also, DVDx is mostly replaced by the IOS202 found at WiiMC: [
www.wiimc.org] which is what is recommended as wii media player.