mp3burn: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On Debian possible default full paths are:

/usr/bin/mp3burn - from package: mp3burn

You may install the required package with command apt-get install {package}

Error in other languages:
mp3burn: bevel nie gevind nie
mp3burn: comandă negăsită
mp3burn: comando não encontrado
mp3burn: commande introuvable
mp3burn: command not found
mp3burn: käsku ei ole
mp3burn: không tìm thấy lệnh
mp3burn: komanda nerasta
mp3burn: Kommando nicht gefunden.
mp3burn: kommandot finns inte
mp3burn: komut yok
mp3burn: nie znaleziono polecenia
mp3burn: níor aimsíodh an t-ordú
mp3burn: no se encontró la orden
mp3burn: no s'ha trobat l'ordre
mp3burn: opdracht niet gevonden
mp3burn: parancs nem található
mp3burn: perintah tidak ditemukan
mp3burn: príkaz nenájdený
mp3burn: příkaz nenalezen
mp3burn: команда не найдена
mp3burn: командата не е открита
mp3burn: 命令找不到
mp3burn: コマンドが見つかりません