Firstly, can you find the correct model - you will not find any support or downloads in the future from Sony if you use an invalid model type. You are probably quoting the chassis number which is shared by several different models. Look on the screen surround or the box - the correct model type will start VPCExxxxxx.
I guess you are using Windows 7 64-bit on your new Vaio and I bet you are using a different, older OS on the laptop that worked. It sounds to me like the USB stick is not compatible with Windows 7 and the IPv6 internet protocol.
Have a look and see if anything here helps: -
http://www.boards.ie/vbulletin/showthread.php?t=2056020211
