[Resolved]  Nokia N73 — Certification expired for symbian .sis files

I have using N73 set for last oneyear.My problem is .sis file for mobile theme.i have download a .sis file from a website and download in my PC, then transfer the file in memory card of set through DATACABLE.But the.sis file is showing UNABLE TO OPEN in my set when want to install it..please suggest me a way solve this problem.

my files are also not opening...

I dont know why the downloaded themes in sis files does not instal in my nokia N73.it shows certificate expired when i install it.Give of a solution how to install the downloaded themes.

I have using n73 set. My problem is that when i run .sis file in my set then it shows .sis file not supported on your phone and i also use it to download through my PC and the problem is same. So plz plz suggest me.

i am use to n73 mobile sis file not supported and certficate is expaird
so pls help me yarrr...

Sis file unable to open in n73 mobile please solve this problem

I Have using the Nokia N73 Music series mobile. But the game applications to be installed the my mobile and its shows Certificate Expried. Give me solution pleace

I had downloaded many of the theams and software which are sis file but when i went to install them it wont, it tells that certificate error, so what can i do plz suggest me sir

i have n73 but i got a problem when i install smart movie or other .sis file it can give an error "expaired certificate" please give a solution for this error...

how to install the sis file help me friends

fast reply me