Sometimes when we try uploading images through FCK Editor tool inside an aspx page it throws an error[XML 403 path Error].
To solve the same problem one has to to configure manually.
STEP-1 :
File Path : fckeditor/fckconfig.js
Previously :
var _FileBrowserLanguage = ‘asp’ ; // asp | aspx | cfm | lasso | perl | php | py
var _QuickUploadLanguage = ‘asp’ ; // asp | aspx | cfm | lasso | perl | php | py

We have to change ‘asp’ to ‘aspx’

STEP-2
File Path : fckeditor\editor\filemanager\connectors\aspx\config.ascx
Previously :
Change-1 : Enabled = CheckAuthentication();

Change-2 : UserFilesPath = “~/upload/”;

Change-3 : UserFilesAbsolutePath = “C:\\upload\\”;

Chnage -1 : change it to Enable = true;
Change -2 : change the folder name in which you want to store the uploaded image.
Change -3 : change the absolute path of the folder in which you want to store the uploaded image.