VA Score - Only 20 with 50% accuracy? What should I do ?

Dear Friends, Please help I have one month to got for my Gmat exam. While practicing from Manhattan. OG and Powerscore, I was doing well and thought I would be near 600 level somewhere. However, when I took gmatprep test I was thoroughly dissapointed as I scored meagre 530(Q42, VA 20) ...I don't kno...