I Don't Have Mods Installed?

[BlazS14]

i have tekkit 2.1 server and 1. thing is that i need to delete advanced machines because modloader cant load them or shomething 2. thing is that when i want to log in my server it says i dont have some mods installed and i have tekkit 2.1 client and in loging in i always choose tekkin not yogbox vanilla or technic if anyone can help with server or with mods pleas HELP!!!!!!!!! :( :(