Nintendo DS: The Sims 2?

There is a part in The Sims 2 game in Nintendo DS that I don't understand what to do. The scene is that there is a part in the game that you should earn a Mechanical Skill of 5, then you should get the Antennae blueprints of the Robot in the Penthouse. The problem is, I can't get inside and get the blueprints from the robot! The robot is always throwing me back to my room all the time. What should I do?? Help me, please!!!