OK it sounds like she did not authorise her account. When you sign up you get an email with a link / code and instruction to authorise the account. This is to cut down on the spam/bot accounts.
If you don't do this the account is deleted in 48 hours. Possibly she used the wrong email address or the email was stuck in a spam filter.
She can set up the account again. If she doesn't get the email to authorise it then let me know (PM, contact form etc) and we will sort it out.
Once the account is authorised she can post in the forums although there are restrictions on what she can do initially.
If this post is irrelevant to the topic please ignore it.
It may be a test and it may be deleted shortly.