FML HAS FOUND ID MISMATCHES (SEARCHING FOR HELP)

[stormzicecream]

Hello.
First, sorry for my not do good english 

I've made my own modpack and it works 
I've been trying to make a server with my modpack on it, and it works.
The only problem is that if I join the game, Forge tells me something:

Forge Mod Loader has found ID mismatches
Complete details are in the log file
ID 23299 is mismatched between world and game
ID 23905 is mismatched between world and game
ID 23904 is mismatched between world and game
ID 23319 is mismatched between world and game
ID 23319 is mismatched between world and game
ID 23317 is mismatched between world and game
ID 23322 is mismatched between world and game
ID 23920 is mismatched between world and game
ID 23921 is mismatched between world and game
ID 23323 is mismatched between world and game
ID 23320 is mismatched between world and game
ID 23922 is mismatched between world and game
ID 23321 is mismatched between world and game
ID 23923 is mismatched between world and game
ID 23924 is mismatched between world and game
ID 23326 is mismatched between world and game
ID 23925 is mismatched between world and game
ID 23926 is mismatched between world and game
ID 23324 is mismatched between world and game
ID 23325 is mismatched between world and game
ID 23883 is mismatched between world and game

You cannot connect to this server
| Done | <-- Button

I tried everything to solve.. Replacing my config file with the one from the server,...
By the way, my modpack is launched by Technic Launcher.

Do you please want to help me?
Thank you

[GenPage]

ID 23883 is mismatched between world and game

Item/Block ID 23883 is saved on the world as a different Item/Block than what is current set in the configs you are running.

 

This is probably because you are using the same world as you change configs/add mods/etc. Sometimes you will need to create a new world (Delete the /world folder on the server)