Sfm

i need suggestion.plz help..this was my 3rd attempt of 1st grp.i hv already cleared 2nd group. I m lacking in sfm. my marks in sfm was 49 , 31 , 21 in 1st ,2nd , 3rd atempt. my markes r going down. I realise dat my concepts are not cleared. I referred aditya jain book. i do not belong from delhi. I studied through satellite classes in my hometown. now what should I do. whether I should go for rajesh makker clases in delhi or or i should refer rajesh makker notes for self study nd I should refer rajeev singh classes at hometown. plz suggest me..