Error "You can’t open... ...on an Intel-based Mac."

Hi.

On the System Preferences app. When I try to open Mail, Contacts & Calendars (preference pane), it gives me the following error:

"Preferences Error

You can’t open Mail, Contacts & Calendars preferences because it doesn’t work on an Intel-based Mac."

I already re-installed OSX Mountain Lion, and it didn't fix anything.

I noticed however, that the actual preferences file: InternetAccounts.prefPane has different permissions than the rest of the .prefPane files.

- All other .prefPane files have "System" as the first user, however, my InternetAccounts.prefPane file has "Me" (myself) as the main user, and not the System user.

Question:

A. Does someone have a solution for the problem in general?

B. Can someone check their InternetAccounts.prefPane file and let me know the preferences. The file is located at: System/Library/PreferencePanes/InternetAccounts.prefPane

C. If, your InternetAccounts.prefPane file has System as the first, or any user, can someone let me know how to set System as a user? Hopefull this will fix the problem.

Thanks to anyone trying.