Is that current score from the real test? It looks like it, but I want to make sure. I'll answer assuming that it is from the real test.
On the quant, my answer is short: keep up your skills there, do whatever you did before, and hit that 50 again. :)
For the verbal, I need some more specific data from you. Use the below article to analyze your most recent MGMAT CAT (and tell me ANY ways in which you deviated from official conditions, including skipping the essays):
http://www.manhattangmat.com/blog/index ... ice-tests/Then come back here and tell me what you discovered. Note: don't just list the data - tell me what you think it means. That ability to analyze is crucial to your ability to improve!