Minecraft chunk loader problems?

I'm currently playing the minecraft caste modpack with the ancient warfare mods. These include 2 xhunkloader included. My problem now is that when I put the chunk loader they do not work. I have to leave then the server and join joinen then they run for a few minutes and then it will not work again. Does anyone have a suggestion why this can be and what can I do there?

Set the config correctly. The chunk loaders are there for your chunks to be loaded when you are on the server, not when you leave the server. For that they have to be changed.

So it's about when I'm on the server. The chunk loader runs for a few minutes and everything runs and then the game suddenly dies and it no longer runs only the player radius is loaded