I don't know what else to do at this point.  I took 2 prep courses read Headfirst, Kim Heldman, Rita's 7th edition book and study really hard over the past 6 weeks, and still couldn't pass it.  And, yes I did the mock exams my scores range from 50s to mid 70s in that order.  I've taken the following mock exams Rita's Fast Track, Simpilearn, Brainbok , PMTI, and PMPforsure.