NoFacedHobo

I have a server hosted by Bisect. It is pretty heavily modded and for some reason water isnt affecting dropped items or boats. For example, the river currents arent pushing rafts or boats, and if an item is dropped in the water, it falls as if no water was there. I loaded a single player world with the exact same mods and settings, and it worked fine. Is there anything I can do to the server to cause the physics to work properly?