Zend certified PHP/Magento developer

Illustrator and OpenStreetMap Troubleshooting

The following link (https://www.youtube.com/watch?v=QJijw_MBZv0) shows how to create a figure-ground drawing with illustrator. I understand until the point about selecting the buildings. My buildings are not selectable in Illustrator, thus I cannot group select them. Would anybody happen to know how to solve this issue?