Nice Fly Mod Online

For some reason, I can't seem to get the Nice Fly mod working online. I'm using the bypass and every other mod works fine online, just not Nice Fly. In singleplayer, it works fine, but in multiplayer, it's just high jump and invincibility. It works for my friend every time, and we aren't sure what the problem is.

I'm on Windows 8.1, and so is he.

Thanks

This should probably be in the discussions thread, or at least on the mod page.....