I recently got my IELTS score. It's L-7.5, R/W/S-7(in all three), overall 7.
I checked my CRS score on CIC.GC.CA and it's coming around 411. I'm post graduate, with 4 yrs of experience and married. My wife is graduate with 5 yrs of experience. We both have given IELTS.
You have to improve your IELTS score. It certainly makes a lot of difference!
Have you tried putting a higher score (around 8) in your CRS calculator? Do give IELTS another try if you see a significant change in the calculation. There is no other easy way to increase your CRS score.