Making a Singleplayer World into a Server

[jackalope500]

I am trying to make a server using my single player world. When I put the world folder into the server folder and run it, the server doesn't crash, but it gives me a ton of warnings such as:

[WARNING] Skipping TileEntity with id TileEntityCarpentersSlope

[WARNING] Skipping TileEntity with id TConstruct.Servants

 [SEVERE] Item entity 113 has no item?!

These are just a few of them and there are 100's of these errors. When I join the server, all the blocks from the modpack are gone, but some of the mods are still working just without data loaded (Morph mod has none of my morphs). I have tried copying over the mod folder from the singleplayer world and also the other folders like the config folder, but I get the same issues.

Any help is appreciated,

Thanks!