As already mentioned, I suspect your HI Fi does not play the RW type of disc.My Hi Fi does the same thing, but will accept CD-R discs if the music is in Audio format.If the songs are in MP3 format, my Hi Fi will not play the disc either.
Try copying the disc again, but using a CD-R.If this does not work, I suspect your HI Fi does not play MP3.I dont know Roxio Easy CD, but I would imagine it is a bit like Nero where it gives you the option to burn as an Audio or MP3 disc.If Roxio has this option, try making an Audio disc.You will only be able to fit around 20 tracks on an Audio disc though.