Problems with Experts and Jobs demo data

Hello
I have set up the above plugin and all seems fine except when it comes to setting up the demo data for experts and jobs.
I have activated the add on for both. I then click the 'submit' button and the loading bar goes to 100% and then says 'Done" but there's nothing there.
I try on both experts and jobs, yet no data is added.
Please help - am I doing something wrong?
Duncan