Zentyal Server Error : DHCP wont start

The dhcp service of our zentyal 3.0 server was suddenly stop, then if i try to click the start button of DHCP on the dashboard. Error says "Error restarting service DHCP. See /var/log/zentyal/zentyal.log for more information.".

I tried:
Restarting the dhcp service through CLI but no avail.


Error Logged:

2014/02/22 15:58:03 ERROR> Sudo.pm:234 EBox::Sudo::_rootError - root command /sbin/start 'isc-dhcp-server' failed.
Error output: start: Job failed to start

Command output: .
Exit value: 1

2014/02/22 15:58:03 ERROR> Service.pm:826 EBox::Module::Service::__ANON__ - Error restarting service: root command /sbin/start 'isc-dhcp-server' failed.
Error output: start: Job failed to start

Command output: .
Exit value: 1
2014/02/22 15:58:03 ERROR> RestartService.pm:67 EBox::CGI::SysInfo::RestartService::__ANON__ - Restart of DHCP from dashboard failed: root command /sbin/start 'isc-dhcp-server' failed.
Error output: start: Job failed to start

Command output: .
Exit value: 1

Solution :
* I managed to trace the problem, (object member name conflict)
in my case the dhcp won't start because I added new member to one object which is the same name with the member of the other object.

* just delete/rename the new member that caused the conflict with the other object member. 

Go to this forum for more info http://forum.zentyal.org/index.php/topic,20689.new.html#new