NAIPS for the iPhone was broken and kept throwing error messages about not being able to login to the Airservices. Wouldn't work with any combination of 4 or 7 character passwords.
Got update thru iTunes this morning and all appears fine now. Must have been due to changes to the new Airservices web service.
NAIPS for iPhone has become almost essential for aviation and caused some swearing on the weekend when it was broken.