http://europe.nokia.com/A4403097?caseid=63923
原文:
When I try to install an application (E. g. theme, game, VPN client) to my Nokia device I get an error message: "Installation security Error. Unable to install" or "Certificate may yet not be valid, is expired or phone's day settings may be incorrect"
If you get such an error message, please
set the device date to before 12.6.2007 (or for some applications maybe even earlier), and then this error doesn't appear and installation continues normally. After installation you may set date back to current date.
原來要改時間! Nokia 好野!