Luke Murphy scored the visitors' second-half winner, leaving the Iron bottom of the league table following Saturday's 3-0 defeat at Crawley.
Knill's men host Yeovil at the weekend and despite the positives, their manager feels the need to get three points.
He said: "I am bitterly disappointed that we didn't get anything out of this game but I thought we gave it a good go from start to finish.
"We have what we have as a squad and if people are going to expect miracles from us straight away, they are going to be disappointed. But we have a young team here who want to learn and we will get better, I know we will.
"But I know it is all about winning games of football and we have not done that. The sooner the players understand that the better."