Finally, my problem is Solved : With pygate, no need to register the device EUI, just create one from scratch ! (and edit config.json accordingly) as the doc says

@changeddaily Glad to here it's working now :)

@robert-hh that's true, you can have the libraries anywhere (with Pymakr as well)

@livius thx for your advice, there haven't been a second pysense.py but a lot of other crap and folders, i deleted them now it is working fine! Thank you! i will now use ftp to upload my libs or at least check if everything is ok