What is causing my liftgate issue?

I purchased a 2010 SRX and the seller told me that it needed a new
actuator. I did some research and decided to change out the control module
first. I was able to unlatch the hatch but had to raise it manually which was
way better than crawling into the rear with a screwdriver to do it. It worked for
a few weeks and stopped. When I press on the release, it doesn't release
and I now hear what I assume is the hydraulic pump running which I can't
say that I heard before but can't be sure. I just changed the actuator and still
doesn't work.I checked the fuse and its good. Any ideas