The Marlies (10-14-2-2) couldn't convert on any of their seven opportunities with the extra man in a 2-1 loss to Grand Rapids Saturday night, but jumped out to a 2-0 lead on their first two power plays against Binghamton.
However, the Senators (9-15-1-2) scored four unanswered goals the rest of the way to win their second straight game.
"It's the same thing over and over again," said Marlies coach Greg Gilbert, whose team has lost two games in a row and five of its last six. "We get ahead, and they think they can be fancy and . . . find an easy way to get a job done. That's why we are where we are."
The Marlies outshot Binghamton 38-23, but Sens goalie Jeff Glass held his team in the game - and though Toronto held a 2-1 lead entering the third period, they couldn't get key saves from Justin Pogge and allowed two goals in a five-minute span to give the visitors the win.
"If we score on some of those opportunities early, we take the wind out of their sails," said Gilbert, who couldn't hide his frustration after the game. "Instead they hang around and hang around, we get soft, and they capitalize on theirs."
Added Marlies defenceman Jay Harrison: "We're having a little bit of a lack of discipline in the way we play. We have the ability to win a lot of hockey games, but when we get away from the system we've worked on so hard, things go awry rather quickly.
"We didn't do the little things right. We outplay a team, we out-chance a team, but we didn't do what we needed to in order to finish ahead of them on the scoreboard. That's all that matters."
Chris Harrington and Kris Newbury scored for the Marlies.
Andrew Ebbett, with two, Danny Bois and Arttu Luttinen had the Senators' goals.
Playing in front of an announced crowd of 3,479, the Marlies were first on the scoreboard when Harrington beat Glass on the power play at 11:04 of the first period.
Newbury's power play marker at 1:32 of the second made it 2-0 Toronto before Ebbett cut the lead in half with his eighth of the year at 12:39 of the second.
Bois tied the score with a power play goal at 6:40 of the third period, and Luttinen put Binghamton in front at 11:28 with a soft goal on Marlies netminder Justin Pogge. Ebbett added an empty net goal with 46 seconds left in regulation.
Glass (4-8-1) made 36 saves in the win, while Pogge stopped 19 shots and fell to 3-9-0 on the season.
Notes: Fan balloting for the 2007 AHL all-star game kicks off Monday on the league's official website (www.theahl.com). Voting will decide both starting rosters for the Canadian team and the World team, who will face off when the game takes place at Toronto's Ricoh Coliseum Jan. 29. Fans may cast ballots until
11:59 p.m. Jan. 7 . . . Binghamton's Bois took four penalties - all for different infractions - during the game.