How was your timing? It's possible to get better at the material but have serious timing problems - and then your score might not move at all.
What kind of practice test did you take? If one of ours, you can use the below article to analyze your results:
http://www.manhattangmat.com/blog/index ... ice-tests/If you took GMATPrep, that test doesn't give you any data... so you may want to take one of ours to get good data. We can then use that data to figure out what's going on and how to get better.
Did you time yourself when you were doing the OG questions? Did you set up sets of questions for yourself, so that you were practicing stamina as well? Did you make sure to throw some harder questions in the mix? (The higher the question number in OG, the harder the question.)
So go analyze a test, thoroughly, then come back here and share your analysis with us (note: not just the raw data - tell us what you think the data means).
If you do have a timing problem, read this and start doing what it says:
http://www.manhattangmat.com/blog/index ... anagement/