Creo, también que el problema puede deberse al dichoso "Vista". En la propia página de Panasonic dan algún dato que va en esa línea.....

"If you are creating the firmware update disc on a Microsoft Windows PC, we recommend using the standard Windows XP writing application".

"The firmware update disc requires to be created with ISO9660 format. In case you are creating the disc on a Windows Vista PC, Windows Vista standard writing application does NOT support ISO9660 format. Please create with a supporting writing software.

When using writing software, please follow the operating instructions provided for the writing software. Please be aware that "packet-writing" is not supported."