Texture Problem

I’m trying to convert a bunch of icons to VTF for GMod, I’ve converted one already and it worked fine
However, When I attempted to convert some more today it didn’t work.

This is how the image looks in gimp:

This is how it looks in VTFEdit:

This is how the one that worked looks in VTFEdit:

Anyone got any ideas of why this is happening and how to fix?

EDIT: Nevermind , fixed. I just re-downloaded the icons and tried again