Hi,
I do not know what types of problem you are having, however there is a helpful document that explaines how to troubleshoot majority issues with ACE.
Could you please have a look at this document ?
Cisco Application Control Engine (ACE) Troubleshooting Guide
http://docwiki.cisco.com/wiki/Cisco_Application_Control_Engine_%28ACE%29_Module_Troubleshooting_Guide%2C_Release_A2%28x%29
If you have further question after reading that, please get back here and let me know.
Regards,
Kimihito.
