I'm looking for a better and more stable Task-Planner for Windows
Server. Any hints are most appreciated.

It should meet these requirements:

1. Stability!
2. Dependency between jobs, i.e. job n+1 should start after successful
run of job n
2a. The jobs should run once a minute, but should wait for successful
completion of previous run.
3. Notification on errors.
4. extensive log files.
5. Service has to be monitored.
6. Stability!

I had a glance at 24x7 scheduler. It seems to meet most of the
criteria. Can anyone say something about it's stability?

Best regards