I just fixed my problem (v1.8.3 for my installation).
I set the name attribute in the <server />
in dashboard.config to match the host name. I'm not sure if this is required, but this is the first thing I tried.
Then I checked the bindings for the site hosting the dashboard in IIS. The host name for the binding was empty, so I changed it to the host name for the site.
I noticed that the CCNet machine event log had exceptions logged in an unknown domain when I tried to connect CCTray to it.
When I went to add the build server to CCTray on the remote computer, I selected it using the control panel, and it worked for me.
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