cakephp FileUpload plugin - not creating HABTM association

I've used FileUpload, a plugin, and created an uploads table, a notes table, a join table (notes_uploads), and the appropriate associations in the models Upload and Note. When I use it, the files are properly uploaded to the /files directory and the uploads table gets the appropriate data. But the join_tab开发者_如何学Cle is not updated. Is anyone familiar with this, and if so any suggestions?