Hello Filippo Tognola as you see i quoted only the Miner you are using " TeamRedMiner " .
And as you have written that you not speak good english thats the only reason i writte this here now .
Because there 2 simple ways to find the problem.

1. Try to google the error your got " Watchdog triggering miner shutdown after restart script execution " (Thats what i have done)
2. You looking straight into the Thread of the TeamRedMiner .

And you will not believe it Google toke me straight to the Thread of TeamRedMiner with already written there the same problem.
Look at this post here and also read the next posts also and it maybe would be helping to fix the problem you got.
https://bitcointalk.org/index.php?topic=5059817.msg48416978#msg48416978

Good Luck and hope this will solve your problem.