ZD won't start and no error message

-Added the 127.0.0.1 to the hosts file.
-I installed the Zimbra Desktop zdesktop_2_0_b10580_win32.msi as local admin.
-Installed in default dir (C:\Program Files (x86)\Zimbra)

-reboot
ZD won't start and no error message

-startup as admin the console
-started ZD with ...\cscript .."...zdrun.vbs")
error: "couldnot start service..."

Is there a Howto for win7 home 64bit installation?
What kind of service should be present (yahoo, Zimbra..?)
will this work?