Cartextures not working

I created a couple cartextures using a program called Canvas. I created two of them and both worked yesterday but today they don't work on any rollercoaster. Instead of displaying the texture in the sim, the car is entirely white except for a few trim parts which can be custom-colored in the editor. All other cartextures work fine. What's up with this??? I saved it in the correct dimensions (512x512) and in the TGA format. What the flippin hell is goin on???

OK new problem now: I realized I could use PNG files so I did that and it works... mostly. I can't seem to change the color of the restraints and a few trim objects. They are this off-white that I can't change. Any ideas?

Nevermind, I figured it out. I was coloring the wrong items on the key and expecting the restraints to change.