I am not sure if fl studio is 64bit rewire. If you install the 32bit version of sonar x1 it will work.
If you have Reason 6 it is definitely 64bit rewire client.
Intel core i7 2600 3.4 GHz 64 Bit
16 GB of Memory, Sonar Platinum ,OS Windows 10 Professional, Sound Card: Komplete Audio 6, Controller: M-Audio Keystation Pro 88