Feeling low..:(

Hello friends I am a student of ipcc. I m giving my 3rd attempt in November 13. I scores 57 in accounts in class 12th and took up CA to prove that I can do accounts and achieve my dream of becoming a CA. But after giving 2 attempts I realised that my accounts concepts are very very poor. I never scores above 40 in accounts and cost.I took classes but still my concepts are not 100%. This time I am determined to clear these exams as I don't want to quit. But am feeling very low as I don't know whether I will be able to or not. Should I really quit CA?