What size does it say when u check the file's properties? Also, set CD Creator for data burn & drag/add the file to it. What size does it say?
If you have an audio editor, why don't u edit the tune as wav. I think CD Creator should itself be able to export the file as wav. Or alternatively if you have an mp3 player that can convert it. For free audio editors check here (Audacity sounds reasonable & can convert several mp3 types to wav.)
http://www.nonags.com/nonags/auedit.html I don't know about shoutcast or how it works. I wonder if this mp3 is an mp3 format that Roxio CD Creator doesn't totally understand. I had that problem with Roxio Toast (same company, just different platform) for a single 3 hr concert mp3 (even iTunes couldn't play it!) & had to convert it to aiff using an mp3 converter. I then used an audio editor (Peak) to separate the tunes & clean it up. Oh if u choose Audacity it may need some free xtras for encoding from
http://audacity.sourceforge.net/windows.php