From 3230 to the computer to download on the phone can not install the SIS file?

I am from the computer to download the SIS file can not be installed in mobile phones? Which opened the SIS file say what error.Ah Why is that? My cell phone is NOKIA3230

is the first to apply for the certificate to download the software to re-sign after you install it.You can look at the Forum on Saipan to see./ cell phone made a mistake by not The document in support of the procedure, so the situation there.