Hi Lorna
I'm sorry, but I don't have any idea why the filters aren't working for you in PSPro.
Since you already re-installed the Eyecandy Filters and it didn't work, you could try going to File|Preferences|file locations|plugins and adding a link to the Photoshop folder that has the Eyecandy filters.
My Eyecandy 3 was originally installed for PSPro 8 and I linked to the PSPro 8 plugin folder when I bought PsPro 9. It works like a dream.
Elizabeth