If i look at the bolded part, my guesss is that your hard drive is not formatted with the correct clustersize, it has to be 32 KB (or lower) for DM and UNEEK to work.Try actually UNINSTALLING the latest DM 2.0 WAD with a WAD Manager using IOS 249 and then try re-installing DML v1.x again. There's a small issue with later updates of DM that they don't use the same content numbers as DML and the MIOS v10 so they don't always correctly overwrite eachother when switching from DM to DML or from DML to DM.
It could just be an incompatible USB device on the hard drive you're using but just to make sure for future reference, the minimum versions to work with DM are
WiiFlow r505
CFG-mod r35 beta2
USB Loader GX r1191
DM Booter r14
Uninstalled/reinstalled. DM still not working, but as long as CFG plays its little song, I can get DML 1.5 to work again.
I don't know why I can't get DM to work. I guess it's the hard drive, since I've done most everything I can to check everything else (and yes, my different loaders are all very up to date). I guess I just thought that if I was able to load Wii games off my hard drive, it'd suffice for GC games as well? I guess not. Probably why UNEEK never worked for me either.
PS: Thank you for the quick reply.
Also the FAT32 partition needs to be primary (and active, although mine works also without it being active).