Try to login as her and see if you can recreate the issue. If it allows you to login just fine it is an issue with her computer (try cookie security level to medium or low). If it won't allow you to login it's a cookie issue with your baord.

what version of the UBB are you running?

I am a Web Development Contractor, I do not work for UBBCentral. I have provided free User to User Support since the beginning of these support forums.
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