Can't connect to my own server

Hi there

I encounter on really weird bug.

After update my MC to 1.4.7, same as server, downloaded latest forge and IC2 1.112 (even tester 1.115) client won't connect to server.

Server start it without problems. (console say: [IC2] Activating mode IC2 ; so its working as other mods)
On single players no problems, working, can nuke anything, using lasers electric devices or even addons.

But problem happen when i try it connect, my client lost connection instantly.
Server say: XXXX lost connection: disconnect.endOfStream
XXXX lost connection: disconnect.endOfStream

on client side, no error only button "Done", even client not crashed, propably he try it show error what are missing or whatever but there are no error output.

I can try it relog but with same effort.
My char get it inside, its show it position on server console (so login are was success to server), but still lost connection.

Only happen that with IC2 mod even if only IC2 work on server.

Some one know what happen and how to fix that problem?

Well on first view true....

there are many streinght ID's on client and server side... i will replace them and check again...

Yep, problem solved, but that weird me already tried delete IC2 and addons, config files. That ID's are taken "dynamicly" when first time they are created?
Me using same IC2 and addons as on server, but most of ID's was been different.