Mod

Hello, I have a problem, I would like to put mod on my server that I created in vanilla while keeping my card? Thank you for your help

Thanks but I had managed to find the solution but now the problem is that I put a mod except that I all works well but my friends are disconnecting from the server after about 30 seconds for no reason. I would like to know how to do that it does not know more that when there is no mod all works well.

put them on the home or they can play or choose the versions with written minecraft have crashed...

Ce n'est pas bon,
Ils réinstallées le mod, mais ils se sont écrasés encore après quelques secondes sur le serveur me aider s'il vous plaît!!!