Retexture loading problems

Okay, so I'm kind of hoping this is the right place to put this. (Not very good with forums, or anything. Anyway...) I've been working on some retexturing of my own, taking the dumps, resizing, etc...you know the routine. But when I go to load them, some of them won't load...? I've looked around for a while, read alot of tutorials, and spent alot of my free time just learning before I jumped into this project. But now I'm ready to help, but I can't seem to, 'cause the textures in my pack won't load. I've done everything thought possible, I even tried to copy and paste over a pre-made texture to make sure the scale and everything was right, but still it wouldn't load it. But when I put in the texture from the hi-res pack, it loads without a problem. It's really annoying how I can't seem to make any progress because of this. :( I can't see if there's any ripping or tearing in the texture when it tiles, or anything. Just an example is the hi-res texture from Fredil's (probably didn't spell that right) texture pack, in Kokiri Forest, the ground ones...? They load, they're the same size, same name, and everything as the textures I made, but mine won't. :( And when I import the textures from the water I made, they do load, and I haven't done anything differently than I have with the ground ones. Is this an obvious problem...? Can I fix it...? Google couldn't answer those, but I hope you can. :(