Unable to change User Profile

I am unable to change the/my user profile in cb.

In Community Builder/user pfofile I have set to "yes" under "Allow user to edit CMS parameter in front end".

When I try to save the user profile changes, I get the error message "The e-mail is already registered. If yo forgot your password click on the Forgot Your Password link and a new password will be sent to you."

The user profile information is not changed.

However when I log in as the administrator, I am allowed to change the administrator's profile OK. I just can not change the profile when I log in as a regular user.

Thanks,
Karl

Resolved the issue myself:

Through use of techical support, unknown to me they registered me twice with the same email address, although different user names and password. When I tried to change the my profile, I got the error message. To correct this, I went in the back end and deleted one of the double email entries and now works fine.