Snap! Look What I Did

There I was...the perfect shot all ready...nobody was breathing...EmmaLou was in an award-winning position...this was going to be the picture to end all pictures.. The Nikon was set perfectly -- all the little F-stop thingies, etc. at their proper place...She points...she doublechecks the lens cap is off...she aims...she presses the little button...and this comes up:

SHUTTER RELEASE DISABLED.  RECHARGE BATTERY

Oh crap on a crutch.