That's simple my friend. you just turn off the CERTIFICATION on application manager. LOL.

my colleague has E71 and E66 and they experienced that problem before for themes, etc... after i Google the solution, its working for all now. If it says "Expired Certificate", just reduce the year to 2009 to 2008 or 2007. bec some application were created before 2009.

Malum? :)