I dont know where did i go wrong. This is my second attempt and there is no improvement at all. In my first attempt i secured a score of 560 Q46 & V22. I agree that i gave my first attempt in a hurry but my second attempt was a well planned one with a thorough preparation.

Prior to my first attempt these were my mock scores.
MGMAT 1: 600 Q45 & V28
MGMAT 2: 590 Q45 & V26
MGMAT 3: 590 Q47 & V28
MGMAT 4: 600 Q47 & V27

Gave my first attempt on july 1, 2011.
Then, i got busy with business for a short while and again started my preparation with a solid plan on September 1, 2011. This time i went through all the manhattan gmat english strategy guides. Solved all questions in OG and Verbal Review. Gave a total of 9 CATs, still there has been no improvement in my score. What is the magic formula that i am missing. My efforts have been true.
MGMAT 1: 640 Q51 V29 Started 2 Weeks before my final test
MGMAT 2: 660 Q50 V32
MGMAT 3: 690 Q50 V34
Kaplan 1: 670 Q51 V31
Kaplan 2: 720 Q50 V42
Kaplan 3: 660 Q49 V29
Gmat Prep 1: 680 Q48 V34 5 days before my final test
Gmat prep 2: 690 Q50 V33 (with AWA) 3 days before my final test
Gmat prep 3: 690 Q49 V34 (with AWA) 2 days before my final test

I just not able to understand where am i going wrong. I have given all the tests as per standard test conditions. Should i give an another attempt? or is my capability is limited to 580. I actually found the final gmat questions very tough compared to all others CATS!
I am thoroughly confused.