Ok, can she get here and post? We have guest posting enabled so she should be able to get here if you give her a link to this topic and check out her cookies by going to this link: http://bb.bbboy.net/cookiecheck.html
If it says "no cookies", then visit http://google.com/cookies.html
to learn how to enable cookies in her browser.
If you have the 'Processing Screens' enabled she might get a error message saying what the problem is when she is trying to log in...Try to have her come here and post and log in-if she tries to log in-have her close the little 'Logged in' box and also
the entire browser-then open a fresh browser and if it is a cookie refreshing problem she will be logged in.
It could be a number of things so if she can see what kind of error she gets #1 and check at that top link for cookies and whether their enabled or not as well as closing the log in box and browser that might get her back in-if not tell me what happened and we'll go from there.