no worries. the only useful information i can extract from that crash report is that it has something to do with codechicken Core and that it could be a problem with a mod that adds an extra dimension, i.e. mystcraft or ArsMagica2.
if your server isn't huge (over 1GB), you could zip it up and send it to me. that way i can get "hands on" so i can have a good look at the server while it starts/is running and see if i cant find the cause of your problem. if i'm able to fix it, i will zip it up and send it back to you