Double rss feed with domain change

I hope someone can help me on this!

I have a domain http://www.wikiton.org that a recently move succesfully to a .net domain so i see all my post properly there but i want to disable the .org domain RSS FEED.. for some reason i am getting de feed twice on my reader (the .NET and the .ORG) ..how can i stop the .org???

(Please note i am using apache redirection and i have not deleted the original files from the server)