Source array was not long enough

[slavkan]

Pozdrav svima.
Imam exception na metodu ispod.
Sta sa nizom nije dovoljno "long"?

Evo print-screen exception-a:
http://picpaste.com/Screenshot_7-dFA8Vq9P.png
Hvala unapred.

public static CryptoStream GetCryptoReadStream( Stream stream ) 
    {
        ICryptoTransform encryptor;
        Byte[] byteName;
        Byte[] byteSerial;

        byteName=new Byte[32];
        byteName.Initialize();

        byteSerial=new Byte[16];
        byteSerial.Initialize();

        Array.Copy(Encoding.ASCII.GetBytes(Settings.Name),0,byteName,0,
        Math.Min(Encoding.ASCII.GetBytes(Settings.Name).Length,32));
               Array.Copy(Encoding.ASCII.GetBytes(Settings.Serial),0,byteSerial,0,16);

        RijndaelManaged rm;
        rm=new RijndaelManaged();

        encryptor=rm.CreateDecryptor(byteName,byteSerial);

        CryptoStream cryptoStream;
        cryptoStream=new CryptoStream(stream,encryptor,CryptoStreamMode.Read);

        return cryptoStream;
    }