Hacking Burning Problem

[ose90]

I have burnt 2 times the harvest moon tree of tranquility and both aren't working, showing DRE while being put inside the wii.
I burnt them using imgburn , at 4x speed and using HP media which i have been using for a long time(it works for other games, tis is the fist time i get DRE)

My wii is 3.2U and modded with d2ckey.

Any ideas?

Thanks a lot!