fckeditor 4.1 is giving error "Invalid File"

fckeditor 4.1 is giving error "Invalid File" when i am trying to insert an image in the editor please help me anybody


I am using fckeditor4.1 version i use in windows2003 server i did not see

var _FileBrowserLanguage = 'php' ; // asp | aspx | cfm | lasso | perl | php | py
var _QuickUploadLanguage = 'php' ; // asp | aspx | cfm | lasso | php

These lines fckconfig.js and when i am trying to upload image it is saying Invalid File how to overcome this error and how to configure to add a jpeg image to my fckeditor in fckeditor 4.1 version.

Thanks in advance