I find the solution by myself.
I disconnect the MIDI OUT (of the midi Box) and re-upload the MIOS 1.09.
As it can not get response, it asks for a reboot. Just before rebooting the midibox, I reconnect the midi out, then I reboot it.
The MIOS 1,09 is then uploaded, and my bad code is erased.
I have just delete the wrong part of the code, and re-upload my app. and now it works like a charm.
In conclusion, do not use this code (get on ucapps.de) if you need to update your code later...