Hope you don't mind me adding my 2 cents...it sounds like the same problem I had a few days ago. Tell her to change her password back to what it was and she should be able to access the board NP. That's what happened to me, I changed the password and suddenly I was not logged in...then when I logged in it said I was logged in but the screen would refresh to the log in screen again. Once I changed the password back to what it was I was able to access my board as usual.
BTW, I see some things are being repaired....my avatar now works on my board but my new siggy I added is available here just not on my board. Keep up the good work bbadmin, I hope to be able to display my new siggy soon