The information that you provided leads me to believe that the admin user that you have used to deploy the solution on your live server doesn't have enough privileges over the file system and cannot copy the RadEditorList.ascx file in the appropriate folders.
Please either repeat the deployment with an account which has such rights, or copy the RadEditorList.ascx file manually in the corresponding folders on your live server. This should solve the problem that you are experiencing.
All the best,
the Telerik team