chag252

HEELP i have a server set up for tekkit and i can get on it fine no problem but my friend cant, it's that id error with forge mod loader ID 343 is mismatched. World: (ModID: Minecraft, type uv, ordinal 2) Game (ModID: Railcraft, type rc.item.cart.furnace, ordinal 2) ID 342 is mismatched. World: (ModID: Minecraft, type uv, ordinal 1) Game (ModID: Railcraft, type rc.item.cart.chest, ordinal 1) ID 328 is mismatched. World: (ModID: Minecraft, type uv, ordinal 0) Game (ModID: Railcraft, type rc.item.cart.basic, ordinal 0) My friend has windows XP wich is bad allready but i just got him an mc account a little while back and he doesent know how to do anything, people say it's somthing wrong with the server but it's not, none of the forums helped either, HEEEEEEEEEEEEEEEEEEEEEELP