The Kumasi giants conceded first through Sam Adams and although, substitute Abass Mohammed got the equaliser after the break, Kwame Boateng missed a penalty which could have changed the outcome.
''We did not start the game on a good note especially after we connceded the first goal since we lost concentration," Manso said.
"We also had a penalty which we could not score and that brought a little disappointment. But in the second-half, we came back in the game strongly after some substitutions and tactical changes and it resulted in equaliser.
"However, the same thing happened thereafter, so most of our problems against Aduana were as a result of lack of concentration and individuals errors.
"I think that prevented us from winning the game against Aduana but we will work on that because we need to return to winning ways as soon as possible,'' he added.
Kotoko will travel to Accra to lock horns with Great Olympics when the league resumes on May 4, and Manso has assured the supporters of an improved performance.
"Our next game is equally a difficult one because Olympics are traditional side with lots of supporters. They are battling relegation also and would want to win this fixture to avoid the drop but we will not disappoint the supporters. We will make sure we will win to continue our title chase," he added.
Kotoko have dropped one place to fifth on the lob with 20 points, nine behind leaders Wafa.