Many Thanx rd2rk for answering me .
Ampero appear to be a good 2nd choice too but I've already this IRig BlueBoard, so... ( and to be honnest, I like the rubber contact )
So now, I've juste configured my BlueBoard on 49/50/51 and even the 4th button D with CC#68 for Tuner function and it all work fine ( I'm always in Snapshot mode 'cause my presets are increment/decrement by my BOSS FS-7 in EXP 1/2 TRS Jack )
Many many thanks to you , you save my life