Ok mates, I tries to download mo creatures and custom MobSpawner, but mo creatures was in rar file, I put it on the server mods file, and when I opened it, it open for like 5 seconds and then close, and it isnt just for mo creatures, also mods like pokecube, rar files in especific, my version is 1.7.10. Rar isnt compatible with forge servers? If it isnt, what can i do for it to be?