In your launcher select the pack and version, click "download server" for the pack and version you want on the server. Now on the server in /minecraft delete everything except the world file (assuming you have no plugins which I did not see on the crash report). once all you have in the /minecraft directory is /minecraft/world upload everything that you downloaded from the launcher to the server. It should contain a server,jar (rename to what you control panel uses if not default), core mods, mods, maybe a resource pack folder depending on what pack you have, and a .bat etc. just upload all of that into it MAKE SURE THE SERVER IS OFF WHEN YOU DO THIS. Once all of that is done you will have completly reinstalled the pack as that crash report means there are mods missing or on the wrong version so a clean reinstall of the pack
NOT the world is a fairly fast and easy way of fixing it.[DOUBLEPOST=1381185333][/DOUBLEPOST]
no I did not it was not recomended[DOUBLEPOST=1381184726][/DOUBLEPOST]it was on recommended sorry[DOUBLEPOST=1381184892][/DOUBLEPOST]If it helps I'm also running a vanilla survival at the same time
I didn't see that you had a vanilla server running at the same time, however this doesn't seem to be a problem here and shouldn't be unless they are using the same world file. (Running 2 servers is fairly common just keep them in separate /minecraft folders.)