(1) Explain your problem, don't simply post "This isn't working". What were you doing when you faced the problem? What have you tried to resolve - did you look for a solution using "Search" ? Has it happened just once or several times?
(2) It's also good to get feedback when a solution is found, return to the original post to explain how it was resolved so that more people can also use the results.
you cant import start and finish dates those are claulated
you can import constraint dates
you can import actual dates
1st export 1 activity of what you want thne use that as a template to import it back into p6