Can someone help me please , my chaincoin.conf is :
rpcuser=xxxxxxx
rpcpassword=xxxxxx
rpcallowip=127.0.0.1
server=1
daemon=1
logtimestamps=1
maxconnection=256
externalip=X.X.X.X
mnconflock=0
listen=1
masternode=1
masternodeprivkey=XXXXXXX
And my masternode don't work cause of sentinel error ...... what i had to do for this working

Try installing sentinel... https://github.com/chaincoin/sentinel
I am using windows and there is no sentinel.exe
Sentinel is written in python. This can basically run on Windows but you'll need to find a hack to run it every minute. Since running a MN on Win is economically pointless, there's no development done or planned to create Win tools for that. Instead, the better solution is to run the Sentinel from any Linux (or OSX) based system and just let it serve the Win node.
Windows has Task Scheduler (like Linux has crontab), you'll need something like:
https://stackoverflow.com/a/4250516But keep in mind that is an untested procedure - I don't know anyone who is running a mn at Windows