ACAD2012: knowledge base and AutoCAD 2012 say "cannot connect to feed"

I am running AutoCAD Electrical 2012 with SP1.

I don't know when this first happened but I am noticing lately that my acad cannot connect to the knowledge base, or the AutoCAD 2012 feeds.

The only feed that seems to be coming through is the "between the lines" rss feed.

Does anyone know what might be causing this, or how to fix it?

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