Minecraft modded server problem?

Ok so i created a modded server with a FEW installed mods everything works fine but when i install MORE mods the server launcher just closes and nothing more happens… Help!

Sometimes adding more mods screw everything up due to some mods getting in the way of others. You may need to go into the mods settings and see if meta datas overlap or just remove the mods. Sorry there isn't an easier way. I recommend downloading a premade mod pack