Cannot load a personal configuration in the synthesizer

1. Create a piano score (for example)
2. Go to the synthesizer and load a sfz with Zerberus
3. Assign the sfz to the piano on the mixer
4. Go to the synthesizer and click on "save to score"
5. Save the score and exit
6. Open MuseScore and open your piano score
7. Go to the synthesizer and click on "load from score"

-- The sfz will not be load

MuseScore 2.0 on Linux Mint 17.1 (64 bit) and on Windows 7 (32 bit)