Files different from server

Ive checked all over the forum and ive seen people with the same problem, i tried the things that they said fixed it but it dosent work for me. I just started making my own modded textures and i follow the tutorials to the letter. The textures work in private but when i go public and finish loading i get kicked with the error " Files different from server ". I would appreciate it if i could get some help .

aIW or steam?
if steam you can't use textures anymore
if it's aIW
your textures failed