Falling through the void upon joining the server

So recently I joined a modded minecraft server with my friends, I installed the correct mods and the correct forge version. But everytime I join I keep falling through the void and eventually after like 20-30 seconds I get kicked and get sent a message. "Internet Exception: java.net.socketexception: Connection reset" I look at the server and hover over the X and I see "Incompatible FML modded server Server mod list is not compatible." But I don't get it, my internet is fine and I HAVE THE RIGHT MODS AND THE RIGHT FORGE VERSION I DOUBLE CHECKED MANY TIMES ALREADY and it's working for my friends but it isn't for me. Pls help.