Ok guys..I finished up with my debugging. After creating a case at my hoster, they provide me the info, that an old BEC version are running on all vServer. So they updated them to the latest BEC version and now everything is working fine. So thank you for your help and time. The problem was at g-portal.de side.
To sum it up for all other people who are running a server from g-portal.de they have globally updated all servers to the newest/latest BEC version. Everyone who had problem shouldn´t have them anymore!
lahlor got a reaction from KiloSwiss in BEC - Scheduler.xml
lahlor got a reaction from computermancer in Earplugs Script