I tree called twice in that time.
That is what went wrong right there I imagine. Being that close you should of not made a single move or call until they were on the ground. As soon as you called they may have picked you off if your were that close.
2 hunts this season I have walked right under the tree the gobbler was roosted in because I knew the area but not his exact location. Both times I slipped away quietly as possible. Both times no more than 50 yds from the bird. Both times not a call, movement, or sound made until the birds were on the ground. Both birds are now dead.
In one of those hunts another board member, AJH, was with me. We walked 30 yds away from the gobbler and right under a hen. Not wanting to bust them we sat down right there and sat quietly. When that gobbler gobbled and strutted no more than 5 mins later we knew we had him. Because he had no idea we were there he pitched out right into my lap at 15 yds. The hens also flew down all around us and had no idea.
On the fliip side we did bust 8 birds out of the tree the day before. Thing was there was actually 10 birds in the area. 2 more gobblers were still there. Same scenario as before. We waited until we thought the birds were on the ground, AJH then went to calling. Long story short it was another tight roost set up and another bird dead.