Seriously though why didn't my beer give any head i've done it again,I think i'll refrase it,why didn't my beer produce froth when poured into glass,there that sounds better .
I left it to long there might not be enough yeast floating around to carbonate
DRB - your original prediction may have happened. Either not enough yeast or sugar left to ferment ? Possibly something else ( I'm no expert on bottled beer btw )