Members account deleted.

Hi,
I have had a member email me to say their account has been deleted from the forum. As the only Admin on the forum, I know I am the only one on the boards who can access the info from that side, and I havn't deleted it. The member registered yesterday morning, and hadn't been back on untill this morning, so we know it wasn't her who deleted it. Can you shed any light on this?
The forum address is www.mums-drop-in.darkbb.com
Thanks

Have you had a new member since them that you activated??

yeah there was another member registered just after her, and was I activated that account about an hour later-it's still on there

It might be possible there is a problem again a couple months ago on my site and a few others when you activated one account the last one was deleted try make a account yourself and activate it in admin if the last one is deleted it needs to be passed onto tecs

Thank you I shall try that.