Working in the editor but not standalone?

Hey there, I´m using a plugin to unity called DotNetZip (Ionic.Zip.dll) wich allows me to decompress .zip files in C#. Everything is working just as expected in the editor but when i build it to standalone it freezes at the line 54, where the decompressing begins. I´m running on Windows.

 using UnityEngine;
 using System.Collections;
 using System.Diagnostics;
 using System.Net;
 using System.IO;
 using Ionic.Zip;
 
 public class Updater2 : MonoBehaviour {
 
 
     public GUIText info;
     
     void Start ()
     {
         StartCoroutine(Wait());
     }
     
     
     IEnumerator Wait() 
     {
         string latest = "http://www.nexonity.com/data/check.txt";
         WWW latest2 = new WWW(latest);
         yield return latest2;
         
         if (File.Exists(@"C:\Windows\Temp\FinalWorldWindows\version.txt"))
         {
             string current =  System.IO.File.ReadAllText(@"C:\Windows\Temp\FinalWorldWindows\version.txt");
             
             if (latest2.text == current)
             {
                 StartCoroutine(Wait2());
             }
             else
             {
                 WebClient webClient = new WebClient();
                 webClient.DownloadFile("http://nexonity.com/data/FinalWorldWindows.zip", @"C:\Windows\Temp\FinalWorldWindows.zip");
                 Decompress();
             }
         }
         else
         {
             WebClient webClient = new WebClient();
             webClient.DownloadFile("http://nexonity.com/data/FinalWorldWindows.zip", @"C:\Windows\Temp\FinalWorldWindows.zip");
             Decompress();
         }
     }
         
     
     void Decompress()
     {
         string zipToUnpack = @"C:\Windows\Temp\FinalWorldWindows.zip";
         string unpackDirectory = @"C:\Windows\Temp";
         info.text = "Decompressing";
         using (ZipFile zip1 = ZipFile.Read(zipToUnpack))
         {
             foreach (ZipEntry e in zip1)
             {
                 info.text = "Decompressing 2";
                 e.Extract(unpackDirectory, ExtractExistingFileAction.OverwriteSilently);
                 info.text = "Decompressing done";
             }
         }
         
         StartCoroutine(Wait2());
     }
     
     IEnumerator Wait2()
     {
         yield return new WaitForSeconds(2);
         System.Diagnostics.Process.Start(@"C:\Windows\Temp\FinalWorldWindows\FinalWorld.exe");
         yield return new WaitForSeconds(2);
         Application.Quit();
     }
     
 }