WordPress changed the way it runs updates shortly after we released that version. We released an update shortly after to account for their change, but you will have to upgrade manually from 1.3.
Get the latest version of the plugin from the downloads page, deactivate and delete the current version (the forms are stored in the database so you won't lose those), then upload and activate the newest version. After that, you're auto-updates should work normally.
Posted 11 years ago on Wednesday March 30, 2011 | Permalink