errors when building

i am trying to build a game for windows 86-64x and i am getting thies errors but i dont why can any one help me ?

Code (CSharp):

1. ArgumentException: The Assembly UnityEditor is referenced by SurforgeCore ('Assets/Surforge/Plugins/SurforgeCore.dll'). But the dll is not allowed to be included or could not be found.
2. UnityEditor.AssemblyHelper.AddReferencedAssembliesRecurse (System.String assemblyPath, System.Collections.Generic.List`1[T] alreadyFoundAssemblies, System.String[] allAssemblyPaths, System.String[] foldersToSearch, System.Collections.Generic.Dictionary`2[TKey,TValue] cache, UnityEditor.BuildTarget target) (at C:/buildslave/unity/build/Editor/Mono/AssemblyHelper.cs:156)
3. UnityEditor.AssemblyHelper.AddReferencedAssembliesRecurse (System.String assemblyPath, System.Collections.Generic.List`1[T] alreadyFoundAssemblies, System.String[] allAssemblyPaths, System.String[] foldersToSearch, System.Collections.Generic.Dictionary`2[TKey,TValue] cache, UnityEditor.BuildTarget target) (at C:/buildslave/unity/build/Editor/Mono/AssemblyHelper.cs:162)
4. UnityEditor.AssemblyHelper.FindAssembliesReferencedBy (System.String[] paths, System.String[] foldersToSearch, UnityEditor.BuildTarget target) (at C:/buildslave/unity/build/Editor/Mono/AssemblyHelper.cs:196)
5. UnityEditor.BuildPlayerWindow:BuildPlayerAndRun()
6.  

Code (CSharp):

1. Build completed with a result of 'Failed'
2. UnityEditor.BuildPlayerWindow:BuildPlayerAndRun()
3.  

Code (CSharp):

1. UnityEditor.BuildPlayerWindow+BuildMethodException: 3 errors
2.   at UnityEditor.BuildPlayerWindow+DefaultBuildMethods.BuildPlayer (UnityEditor.BuildPlayerOptions options) [0x0020e] in C:\buildslave\unity\build\Editor\Mono\BuildPlayerWindowBuildMethods.cs:181
3.   at UnityEditor.BuildPlayerWindow.CallBuildMethods (System.Boolean askForBuildLocation, UnityEditor.BuildOptions defaultBuildOptions) [0x00065] in C:\buildslave\unity\build\Editor\Mono\BuildPlayerWindowBuildMethods.cs:88
4. UnityEditor.BuildPlayerWindow:BuildPlayerAndRun()
5.