Help: My New Skill Icon looks messy

[kulasdq]

Hello. I downloaded a few skill icon packs from this site for my new skills. I imported the pcx from the pack to the existing skill dc6 file with DC6Creator, then added the new dc6 to Patch_D2.mpq. The new icons appear in the game but just look messy (see Q S F4). There are a lot of green and white dots. The new skills can be used properly though. The pcx seems to be fine and clean, at least when i viewed them in DC6Creator. Dont know why it's messed up here.