During a flow it would'nt be unusual for them to ignore a free meal of honey. I'd move it further away (100yards if possible) and give it a few more days if open feeding in a bucket (Think Robbing!!).
And, I'd NEVER just pour it in front of a hive unless you're trying to start some trouble (again; think Robbing!).
With left over cappings and such I just place an empty box above the inner cover with another inner cover above that (both holes open) and another empty super, this time filled w/ the cappings or wet frames on top of that. This fools bees into thinking they're leaving the hive to feed and its ALL THEIRS, so its a good way to feed a weak colony. They'll clean it up by taking it downstairs in about 24 hours making the cleaned frames ready to use right away in another hive.
Other than that I must agree w/ JP, Allen, Annette and hardwood; a flow is on, the bees have enough honey or 'think' they do.
Remember; Just placing an empty super on top of a box already filled w/ honey (that the queen will not cross) will seldom result in them filling the top one w/ honey. Beeks must encourage them to do so by pulling some of the lower honey frames up into the top supers ala 'checkerboarding/KYBO.'