Defender Steve Elliott and midfielder Darren Carter were on target for the Robins before Dons substitute Brennan Dickenson reduced the arrears after the hour at Whaddon Road on Saturday.
"We have more than enough to stay up - we just have to stay focussed," he said.
"Nothing has changed apart that we have one game less to get to the total we need to get to. There are no easy games in this league but we shot ourselves in the foot by not getting going for an hour. It was too little, too late.
"We can't fear losing games. We have 11 games and they are all winnable but in order to win them, we have to do all the good habits we do well and play in a way that suits us.
"We have to stay strong and make sure that by hook or by crook we get the points total we need."