immsd: 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/immsd - from package: imms-common

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

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