Dons were beaten on their travels in League One for the ninth time this season as Paul Huntington`s header gave struggling Yeovil, who had substitute JP Kalala sent off late on, a 1-0 win and a precious three points.
"Playing away we just don`t turn up. It's a bit like chalk and cheese as we have eight wins at home and nine defeats away," said Robinson.
"I am not hiding behind that at all. When you come to a place like this you have to be sound and the back four gave them too many opportunities.
"Yeovil's goal, from my point of view, was a catalogue of errors. We have got to be sharper mentally, we can't play pretty football which everyone wants to see all the time.
"Plain and simply, we just weren't good enough. We have got to get it right and we have to start getting results on the road if we want to get to the play-offs."