Need assistance to build a report on the Advanced Custom Objects SA, to view all contacts (Recipient

Hi,

Need your inputs to resolve the following request.

We want to build a report on the Advanced Custom Objects subject area, so that we can view all the Contacts (Recipients) under a Campaign.

I used the following fields in the "Advanced Custom Objects" SA, to build this report, but I am getting no results.
Campaign: Campaign ID, Campaign Name
Contact: Contact ID, Full Name
Metrics fields:
Campaign Metrics: # of Contacts for Campaign
Contact Metrics: # of Contacts

I tried to build this report with different combinations of the above two metrics fields but couldn't get any succes, I am getting "No Results" each time I run this report.