That means you don't have user permission..
Log on as an administrator to the server that can host the user's redirected folders. Locate the top-level folder that can hold the user's redirected documents (for example, D:\Redirected, which is shared as \\Server\Redirected\) by using Windows Explorer.
Right-click the folder, and then click Properties.
Click the Security tab > open every single user that's inside the "Group or user names:" list.
Example > "SYSTEM", click on Edit > in order to give full access to the SYSTEM user you must tick the Allow button which applies for "Full Control";
http://puu.sh/9KC5S/2a39fbdc5d.png
After that you just click OK and close all the sheets and/or other boxes.
When you do that you'll have permission to edit your config file.
Also, when you upload something on pastebin I requested, just post it here, don't tell me that you only uploaded it without sharing the link.