FTB Ultimate server crash on login

[willyt1200]

Hi when i try to join my FTB Ultimate server i get this:
http://pastebin.com/Mbe3eGBG
I have tried everything and it is really annoying me.
Thanks!

 

[willyt1200]

I am running windows 8

 

[willyt1200]

Any help guys?

 

[willyt1200]

Anyone? over 100 views, 0 replies.

 

[lavarthan]

What you are doing right now is spamming and saying my problem is more important than anything else. Drop what ever you are doing and HELP ME!!!. That is very rude and may end up getting you reprimanded by a moderator. Please stop doing this. There are many reasons you could have 100views and 0 replies. One is that others are looking to help, but do not know a fix. Or others are looking at your problem for a possible answer or seeing if they have the same problem. The people that help do not live on these forums and patience is required.

at cpw.mods.fml.client.FMLClientHandler.disconnectIDMismatch(FMLClientHandler.java:529)

As for helping you ensure that both the client and server have the same exact configs. This part of the error tells me that you might not have the same ones. Or the save does not. Try a new save after you double check the configs.