Mac problems with 3.1.3

[aarondungan]

i just upgraded my server to 3.1.3 and then it asked me to upgrade my client so i did and now when i try to log on i can get past the launcher and everything its just when i try to connect to my server it says

"the server requires you to have the following mods:

mod_ComputerCraft 1.41

mod_CCTurtle 1.41

mod_IC2 v1.103

mod_Railcraft 5.4.7"

and i had the version before this running smoothly with no bugs or problems can someone please help?