Should be here but not knowing which one makes it rather difficult, besides latest version should be better: http://www.filehippo.com/download_imgburn/ Never used Roxio so can't help you there but why not use ImgBurn to burn the iso, most likely a better burner?

WHY!!! I would rate Img burn as a 9.9 out of 10 and Roxio about .1. I am not surprised Roxio has problems doing the most basic of jobs wait and see what happens when you try to do something hard! That and Sonic "Roxio reincarnated into double garbage" are the 2 worst burning apps on the market. Someone ought to sure Roxio for selling software. I guess if the sell it for a good price someone that didn't do their homework will buy it.

Better yet spend the next year trying to get that jack ass app to do what it is supposed to do.