Have you installed sentinel? Have you made watchdog script working properly via Cron?
Please provide us with the output of manual run watchdog. I mean this command:
>> ./venv/bin/python bin/sentinel.py
You should go to sentinel directory before:
>> cdhome/YOURUSERNAME/kzcash/sentinel
If you make everything properly so you should get emty output. In case of mistakes you ll have smth like this:
>>kzcashd not synced with network! Awaiting full sync before running Sentinel.
or
>>Invalid Masternode Status, cannot continue.
or smth else.
Next execute "masternode list-conf" in your wallet debug console or via kzcash-cli.
This command you should execute on the PC/Wallet where your MN collateral is hold. If you use Windows cold wallet so type this in debug console.
If you use Linux hot wallet and MN on one server so type "./kzcash-cli masternode list-conf"
Here you will sey your MN status. It should be enabled.
So provide us with all the data requested to investigate your problem better!