I haven't been able to figure out why our burndown chart doesn't show progress after reading other threads.
Burndown chart is configuring with Story Points. Tickets have story points and accurately show when they're added to the sprint:

Stories in that sprint are marked Done and have a Resolution, but they aren't reflected in the above burndown. 
Done is the right-most column on the board

The board is configured to use Story Points for estimation
Any ideas? I'm stumped on this one.