PowerMate retentivity

Gentlemen,
I am working on some PowerMate issues.
What I have discovered today is the ladder logic in these is not retentive.
Here is how thing progressed.
I downloaded my ladder to the PowerMates using FAPT2. I used the STORE function and that sent the ladder to the PMC where it functioned as long as the power was not cycled. The minute the power was cycled, the PowerMate would revert back to a old version of the ladder. So what am I missing?

Thanks in Advance.

You probably need to store your ladder program to non volatile memory. The process is covered in the maintenance manual GFZ-62685EN.

I have not used FAPT2 but use Fanuc Ladder III and in that software all you need to do is go online and select Tools then Backup. Some controls need to be in E-stop.