Hello~ I recently tried out starting a modded server (Version 1./8) for me and my friend. I have set up the regular part of the server, port forwarding and all that mess. Before I added mods into the server mods folder and my .minecraft folder, the forge server ran fine. My friend could join and there was no problem... I proceeded to add mods to my client folder and server folder. Before I tried starting the server, I checked if they all worked in Single player. They did. But my problem is that when I ran the forge server .jar, It went through this and came up with this error. (I'm sorry if I posted this in the wrong place, and if its an easily worked out problem, I have a hard time with this sort of stuff)
http://pastebin.com/sfuPniZc
Also, this is my mods folder
http://imgur.com/cXhMZk3