I got my 3th developer certificate on august. The SIS for my phone was from 30.august, the key and cer was from 03.august.
After I installed the sis to provide the new database on my phones, I got always the error that the certificate (the one from 03-aug) was not valid and that the phone can not install apps from unknow publishers.
I wrote 3 times to Nokia last month. Only last week Nokia wrote me back and sent a new rar file with a SIS, KEY and CER from 30.aug. But I have still the same problem. I can't install any apps made with the developer certificate.
On september I installed Anna. Maybe it doesn't work anymore with anna? I don't know why I can't install my apps on my phone. I published all items on the store without testing them on my phone. But maybe it is not the right way to publish an item.
Hope someone had the same problem and solved it.