modding server crash

[HeartlessDeviant 0]

So I was modding my server with some fun stuff for friends and I don't know what happened. I tried to start the server and it came up with the message:

first crash report:

Exception in server tick loop

cpw.mods.fml.common.DuplicateModsFoundException
    at cpw.mods.fml.common.Loader.identifyDuplicates(Loader.java:396)
    at cpw.mods.fml.common.Loader.identifyMods(Loader.java:354)
    at cpw.mods.fml.common.Loader.loadMods(Loader.java:484)
    at cpw.mods.fml.server.FMLServerHandler.beginServerLoading(FMLServerHandler.java:99)
    at cpw.mods.fml.common.FMLCommonHandler.onServerStart(FMLCommonHandler.java:350)
    at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:69)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:445)
    at net.minecraft.server.ThreadMinecraftServer.run(SourceFile:583)

Then I deleted some stupid hat mods that I didn't need in there and it comes up with:

Second crash report:

Exception in server tick loop

cpw.mods.fml.common.MissingModsException
    at cpw.mods.fml.common.Loader.sortModList(Loader.java:228)
    at cpw.mods.fml.common.Loader.loadMods(Loader.java:491)
    at cpw.mods.fml.server.FMLServerHandler.beginServerLoading(FMLServerHandler.java:99)
    at cpw.mods.fml.common.FMLCommonHandler.onServerStart(FMLCommonHandler.java:350)
    at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:69)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:445)
    at net.minecraft.server.ThreadMinecraftServer.run(SourceFile:583)

So can anyone help me out?

[fire_crafter100 0]

This looks like computer talk I believe that you can communicate with it by making robot sounds... No I'm kidding, You gotta PORT FORWARD or try to find what the dealio is in your server files if you can't find anything I'd talk to Eric hes the server guy...

[HeartlessDeviant 0]

I already port forwarded everything I needed to. It's something about the mods I have. The server worked great until I modded it. The first 5 mods were perfect. Then it started to crash

[Ericrb 0]

Make sure ForgeModLoader is updated, or is compatible with your mods and Minecraft.

Also, make sure you remove and/or update mods from ForgeModLoader.