Continuum does not run Schduled Builds

[Mac-Systems]

I have 3 Projects running with Continuum. Two of them are Branches. 
Actually i
use onyl the Default Schedule (build each hour once).
Only the Project which was first Configured in Continuum is build 
Automaticly.
If i commit to a Branch Continuum should build at least after apx. one 
hour, but nothing happens..


If i force the Build via the "Build Now" Button i see after the build 
succeed the change log. So It seem i have configured
all right.

Anyone can help me ?

regards,
Jens