IPod touch will not turn on

Hello,
i have done what it says to do on the site
http://www.iphonealley.com/tips-and-tricks/save-your-iphone-with-recovery-mode it had not finished restoring but my iPod came back on to the boot screen and stayed like it for 60 seconds but then it just turned back off i don't know if this is supposed to happen. the restore has 4 minutes left does this mean i have to do the restore again or will i have to do something else.
Please Help
Thank you