Addon domain problem

[pahlevani.b49]

Well, here I have this problem.
A couple of months ago I added a .co.cc domain as my website's addon domain. Now when I go to addon domains configuration part in my cpanel, it says there are no addon domains configured, and I can't add that domain again since it says it is already added! So there is no way I can change anything about that domain.
So, what's the problem?(and of course what's the solution?!!! :D )

[pahlevani.b49]

It is working well now. Thanks!