[ubuntu] Going nuts trying to get a live cd to work.

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http://ubuntuforums.org – I've been up all night trying to get a live cd of 12 to work. I've burned them to CDRW DVDRW and DVDR I've tried acquiring ubuntu and kubuntu from different sources. 12.04 and 12.10. I have a 10.04 live cd that my computer's been booting from w/o a problem. They seem to burn fine. I've used brasero, the default program in 10.04 and roxio in windows. I'm at a loss. I don't know what to do next. I'm hoping for suggestions. Thanks. (Hardware)