We don't have a copy of Schneiderville hosted on Esri's servers. The sample map service you can use is http://server.arcfmsolution.com/arcgis/rest/services/Schneiderville/ElectricDistribution/MapServer, as described at ArcFM Web 4.4 Installation and Configuration Guide or ArcFM Web 4.5 Installation and Configuration Guide. Were you using an Esri URL for your map service to test with, or was it the URL I listed here?
What I meant was by Adding your services is by clicking on the ArcGIS.COM link in the REST endpoint of your AGS map services. I'm sorry if I confused you.
Matt Crooks helped me by emailing me that the issue was a browser/certificate issue. It's working for us now.