Sarah,
I’m not sure what the problem could be, but i must ask again:
The web_users table is the original table for storing web user data. And now you say you have created a custom table with the same namn. That should not be possible!
Am I missing something here?
Are you sure you haven’t managed to delete the original table for web users? That sure would make ppp not to work, it would also make the web user system not to work at all!
Another question, do you get a blank page when trying to access the admin page, no error messages? If you get a blank page, is it empty without any content, or is it just the ppp stuff missing?
Sorry if these are stupied questions, but before trying to find the problem we need to rule out the obvious.