http://gallery.mobile9.com/f/754577/ install secman from the above link and turn security platform off and then select "install root certificate". try installing your application now.
if the error is "CERTIFICATE EXPIRED", you need to self sign it with, http://gallery.mobile9.com/f/595067/
if the problem persists let me know i'll sign the application for you
very easy dude see the valid date and then change ur phone date between the valid one like if the certificate was manufactured on17 july2008 and expires on 17 july2009 then change the datye anywere b/w the 17 jul an 17 july 2009 then install the game and then after that change date back to normal
iceyhotguy
09 Jun, 2:50PMhttp://gallery.mobile9.com/f/754577/
install secman from the above link and turn security platform off and then select "install root certificate". try installing your application now.
if the error is "CERTIFICATE EXPIRED", you need to self sign it with,
http://gallery.mobile9.com/f/595067/
if the problem persists let me know i'll sign the application for you