The document I showed you above is not yet the revised one for next year. It is dated 24 January 2012. UKBA requires an IELTS test to have the minimum score of 4.0. If you would look at other test providers in that document, i.e. TOEIC, ESOL, etc., they have different marks/grade that UKBA accepts. IELTS doesn't have any lower score than 4.0 that UKBA will accept. She needs to retake the test.