Error CS0101 The namespace 'global::' already contains a definition for 'SmartFox'

So I am trying to fix the last part of this MMO tutorial I am doing. Some of the code beforehand in other scripts needed changing, and Unity has not accepted it, except for this last script which i cannot get to work.
The tutorial is here:

http://www.unifycommunity.com/wiki/index.php?title=Multiplayer_with_Unity_and_SmartFox_tutorial

Unity defines the problem on line 7
The script is here:

using UnityEngine;
using SmartFoxClientAPI;

// Statics for holding the connection to the SFS server end
// Can then be queried from the entire game to get the connection

public class SmartFox : MonoBehaviour
{
private static SmartFoxClient smartFox;
public static SmartFoxClient Connection
{
get { return smartFox; }
set { smartFox = value; }
}

public static bool IsInitialized() {
if ( smartFox != null ) {
return true;
}
return false;
}
}

any help would be appreciated, this is the final bug fix for the build

anyone have any idea?
please?

The error indicates that there’s already a symbol ‘SmartFox’ in the global namespace. In other words, you’ve named your class ‘SmartFox’, but that symbol is already taken.

I’m not that familiar with SmartFox so I can’t really be more specific than that, but that should give you enough info to solve the problem.

просто удали этот файл и всё

导入的package关联了其他的脚本 删除重复的就好了