The Bernard Mwalala led side drew 2-2 with the 2008 league champions Mathare United and the tactician says the team has a problem that needs attention.
"My defense was not stable against Mathare, we conceded easy goals that could have been avoided. It was a match we could have easily won but those mistakes cost us.
"It is an area we need to work on before our next outing because if we repeat the same it means more points will be dropped."
The Millers are currently placed fifth on the table with 27 points.