为什么我的Adobe AIR应用程序说最新更新已损坏？

I have written an HTML/AJAX application with Adobe Air and run it on my WinXP laptop. But now I've released a newer version on my update site, the application downloads the update and says "The application could not be installed because the AIR file is damaged. Try obtaining a new AIR file from the application author."I have written an HTML/AJAX application with Ad