Acronis Managed Machine Service - starts - stops- and that`s it

Hi,

on 4 servers 2008r2 I run Acronis Acronis Backup Recovery 11.5.

On one of them the Acronis Managed Machine Service starts, stops and can`t get started again. If I try I get the error 1067 "the service unexpectally stoped"
After a couple of hours I can start the service again it stops by itself and so on...

I tried to let the service start automatically after it stoped but that doesn`t help. I also tried a repair-installation but without any success.

I appreciate any help.

Thanks
Sven