Error communicating with build loop

Hi,     I have a question related to the Dashboard: 

When I try to force a build I get "Error communicating with build loop on:
<nothing>".  Of course the word nothing is not there, the error message ends
after the colon.  Obviously I need to specify the server but I have tried
doing that several ways and the URL is not getting to where it's needed. 
This seems quite peculiar to me since at the top of the Dashboard web page
my server is very clearly identified following the text Dashboard Server:

I have tried starting CC with the -dashboardurl argument but that didn't
help.  One blog suggested that version 2.8 will solve this, but I don't see
why an upgrade should be necessary, I should be able to fix this within the
2.7.3 version I now have.

How can I tell the 'force build' feature of the Dashboard which URL to use? 
Any help would be greatly appreciated.

Thanks,       .....WZ

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