Confused teachers

Here is my problem - I'm not exactly sure what my problem is, but this is what has happened. I'm trying to get a group of stressed out elementary teachers to easily log in to my pbwiki. However, they initially deleted their email thinking it was spam. Then I deleted them as users, put them in again under a different school email address. Now, there are about 7 people who can not log in.

I've tried helping them. We've tried every way we know how. I've added them as writers and they show up on my administrator page of users, but they can't log in. Do you have a way to fix this? Or can I call someone and have you talk me through it? Thanks for your help. If I don't get them 'hooked' soon, I'm afraid I'll lose them completely with summer quickly approaching. As one of you said on the webinar, I don't want this to end up as a dead wiki. Thanks, agam