Can you please provide some more details like what error you are getting and what attributes exactly you are trying to edit? This looks like a permission issue.
This could be because of an issue with the PI Archive Subsystem as well, so try to modify the PI Point again and check the message logs for the errors.
Vasanth is correct. There is not enough information given here to say anything meaningful without know what you are trying to publish and what error you are getting back.