Critical error (doesn't affect the gameplay or the mod but still an error)

[agronaque512]

When i start my server tell me that they were a critical error. It doesn't change anything (i think) cause i can play with. Here is the error: [20:15:01] [main/ERROR]: A critical problem occurred registering the ASM transformer class am2.preloader.AccessTransformers java.lang.IllegalArgumentException: resource AM2_at.cfg not found. at com.google.common.base.Preconditions.checkArgument(Preconditions.java:148) ~[guava-16.0.jar:?] at com.google.common.io.Resources.getResource(Resources.java:229) ~[guava-16.0.jar:?] at cpw.mods.fml.common.asm.transformers.AccessTransformer.readMapFile(AccessTransformer.java:118) ~[forge-1.7.10-10.13.4.1558-1.7.10.jar:?] at cpw.mods.fml.common.asm.transformers.AccessTransformer.<init>(AccessTransformer.java:101) ~[forge-1.7.10-10.13.4.1558-1.7.10.jar:?] at am2.preloader.AccessTransformers.<init>(AccessTransformers.java:10) ~[AccessTransformers.class:?] at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:1.8.0_77] at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) ~[?:1.8.0_77] at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) ~[?:1.8.0_77] at java.lang.reflect.Constructor.newInstance(Unknown Source) ~[?:1.8.0_77] at java.lang.Class.newInstance(Unknown Source) ~[?:1.8.0_77] at net.minecraft.launchwrapper.LaunchClassLoader.registerTransformer(LaunchClassLoader.java:88) [launchwrapper-1.11.jar:?] at cpw.mods.fml.relauncher.CoreModManager$FMLPluginWrapper.injectIntoClassLoader(CoreModManager.java:108) [forge-1.7.10-10.13.4.1558-1.7.10.jar:?] at net.minecraft.launchwrapper.Launch.launch(Launch.java:115) [launchwrapper-1.11.jar:?] at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.11.jar:?]

[jjtParadox]

This can be ignored (and might be fixed with a newer version of Forge, but can't confirm).