Sometimes it's the actual test taking. I know alot of people who studied and studied and failed 5 times. If you feel you are not good at the actual testing...I am sure that there is something on the internet on taking tests. I made flash cards and had my son help me study all the time. I also got a dictionary of all the meanings of all the terms and took that with me everywhere. When I had a chance to look at it, it was there. I also bought the license tutor which helped me sooooo much!! There was a cram course at school but everyone I talked too that took it failed the test, so I bought the license tutor and it was wonderful. If you fail the test using it, they refund your money.
Good luck...
Angie