PPP breaks after some minute on Strato V-Server

[Theo1]

Hy,

I'm using Parallels Plesk Panel PPP on Ubuntu Trusty Tahr (14.04)
on a Strato VServer.
I was installing TYPO3-Neos-1.2.2 at the moment this happend.
Showed an MySQL-Error (-->connection refused).
After looking at the logs and after phoning to the Strato-Client-Service
I think, that an automatic update has caused this problem.
I tried to restore the PSA Database, but all the MySQL-Application was broken.
No more function.
I decided to reinstall the OS and Plesk, I've a disactivation of the auto-update-module,
but minutes later it happend exactly the same like before.
No idea why autoupdate isn't stoppable.
I hope you can help me with this!

Thank you,

Theo