Problem Forge Mod Loader Item Mismatch Error

[Kadwen]

I just updated my server to the newest recommended version of FTB Ultimate (1.1.2 i think) and when i try to log into the server to test it before letting my friends back on I am getting the below error. The only change to the mods that I made is we do not use Gregtech, i just deleted it out of the Mods folder on the server.

Forge Mod Loader has found world ID mismatches
ID 30832 (ModID:AdvancedSolarPanel, type advsolar.ItemAdvSolarHelmet) is missing
ID 30833 (ModID:AdvancedSolarPanel, type advsolar.ItemHSolarHelmet) is missing
ID 30834 (ModID:AdvancedSolarPanel, type advsolar.ItemHSolarHelmet) is missing

You cannot connect to the server

I have a hosted server from Fragnet.net with 1.5g ram
For the client I just have the recommended install with Gregtech disabled.
For the server i re DL the server files and uploaded the new Mods and CoreMods folder to the server and changed the names on the old folders to Old XXX just in case i needed them.

Any help in getting this sorted out would be most grateful.


Problem Solved: Yeah rookie mistake I updated the Mod and CoreMods folder but forgot to update the Config folder with the new configs. Once I did that all is well.

 

[Kris Martin]

I'm having the same problem, I have no idea what I'm doing, any advice? I'm not sure where my config folder is, is it the client or the server config folder?