Downloading Java problem with Synology DS212j NAS

[InfernoSTi]

I'm trying to update Java on my PPC Synology NAS (213+). I can't manage it whatsoever. It always gives me the "digital copy not signed" or whatever that message is. Yes, I was signed in when I downloaded it. Yes, I unclicked "safe file" in Safari before I downloaded it. I've followed the same instructions I used to load it original Java edition. Totally frustrated here...

Any ideas on what I should do?

Thanks,
John

P.S. Why is it so impossibly hard to update Java on a NAS? Doesn't that defeat the purpose?