Problem FTB moster server that crashes

[Tistalion]

I have a server that crashes as soon as someone comes in to play. We have had the same problem on previous servers without managed to fix the problem. Even after we cleared large areas in MCedit, the server works bad and it lags extremly

Here is a log file http://www.filedropper.com/forgemodloader-server-0

 

[Tistalion]

anyone?
I have found some ID conflicts, but we are running only FTB monster edition so it feels like more people would have had the same problem then !?

Find a mod called "IDFIX Minus" can it work for my problem?

 

[Tistalion]

When I open up the world in singleplayer it loads extremely slowly and I fall through the air. Would say that it takes several minutes for the world to spawn and then lags the whole time.