Stuck on Original Firmware on IPOD Classic 7th Gen

[jayglo]

Hello everyone, been using Rockbox 1 year without any issue at all, but now I don't know why it is stuck on the original OS and i cannot understand why!
I've searched online and only found MENU+SELECT combo to reset it but no luck! It still boots the original OS.
I was worried about my music folders but luckly If I plug the iPod in Disk Mode I can see all the folders are still there, including the rockbox ones.

Really need help with this one