do you know why you aren't doing well? is it a timing thing? do you get bored w/ the passages?
my biggest problem was that I would try and do every passage in order from first to last. even if i knew it was going to be really boring or really hard. eventually, i started getting good at determining whether or not i liked the passage. within 3 words, i made a decision whether I would like the passsage or not and i either a) skipped it or b) read through and did the questions.
that way, i spent the time on the passages i knew i would do well, and i saved the passaged i knew would be hard to til the very end. that way, if i ran out of time or was crunched for time, i didnt stress b/c i probablvy wouldnt have done well on that passage anyway. you know?
as soon as i did that, i started goin from 7s/8s to consistent 9s. you might try that to see if it works at all? good luck!