Hacking Trouble with region free disc loading

[Kyushu]

Hello,

I have a USA Wii U and three EUR games, but I'm having issues loading them.

My Wii U has Mocha CFW and I've tried OurLoader, Spiik and edited the sys_prod.xml region value to 119.

The three EUR games that I have and the results when I try to load them:

• Paper Mario: Color Splash: gives a error message.
  
• The Wonderful 101: the screen just stays black.
  
• Zombi U: this one works... although I only bought it because it was like 5 bucks, not because I really want to play like the other ones.

So, anyone has another suggestion of what I could try? I tried but didn't find a "compatibility list" for region free, so maybe these two games really do not work?

Thank you for any advice.