Upgrade SEPM 12.1.671 to SEPM 12.1.2015.2015

Hi guys,

I'm looking for a solution to update SEPM 12.1.671 to SEPM 12.1.2015.2015.

I think that's not a big deal but i dont have the solution for now.

I have a SEPM 12.1.671 on 2003r2 and i would like to upgrade to the lastest packages without win8 and mac version so SEPM 12.1.2015.2015.

But when i launch the setup i have the invit to do a backup, i did it the first time. But after, i have the setup closed, and nothing.

I tried to disable service but dont work anymore.

Why i'm doing this. Thats simple, the old 2003r2 will be kicked and i must migrate SEPM to another server. The first step is to have same version on servers.

I must to check install log in first or there's is an issue ?

Thanks in advance !