The Rams built a solid lead over the course of the game, but it eventually slipped away with Birmingham scoring a late equaliser.
Simpson and manager Steve McClaren were both disappointed and the former has suggested the three things the side need to do differently against Norwich this weekend.
“We had players driving out of position, giving the ball away and conceded needless free kicks,” said Simpson.
“We have to learn a whole host of lessons and not get screwed up by it.”
His comments suggest that a key factor is going to be vital for the team looking forward; discipline.
The discipline has to be better across the team and the message can only come from the officials at the club, as well as the key leaders in the team.
If Derby can get to grips with their discipline in terms of the way they play, they should be able to respond positively to the recent setbacks in results.
There are going to be further twists and turns over the rest of the season and it’s important Derby are making as few mistakes as possible over the rest of the campaign.
It’s a common sense and logical point for the coach to make and regardless of those responsible for the errors against Birmingham, the shock of dropping those points should ensure a good performance against the Canaries this weekend.