I think there is something wrong with the firmware update file, so I'm trying to find another line6 device to check the fvb. If it is ok, the next sep will be a factory reset for the spider and repeating the download and the upgrade again.
If the fvb doesn't work with other device, obviously it is damaged and it will visit the service center...
First I'll wait for another users experiences for a few days .
I'll keep you informed.
Thank you and my apologies for my bad english again