Evolution thinks it's not connected

Hi All,

I've just loaded Trisquel on a USB stick and booted it up.
All works fine, except when trying to set up Evolution.
All I get is an error message saying Evolution has to be on-line to work.
Fair enough.
But I've got web access OK and everything internet-wise is working.
So why does Evolution insist that it's not on-line?
I have no answers, so hope you guys have ?

Ron