You're going to have to clarify where you're making panning an volume changes and what audio outputs you have set up for AD in SONAR.
If you're only using the stereo Master output from AD, panning may seem to have minimal effect because the Room, Overhead, FX and bleed signals from other instrument channels remain centered. In order to get full control of the instrument placement and levels, you'll want to enabled the individual "Out" routing at the bottom of each instrument/channel strip in AD, and set up a corresponding tracks in SONAR with input set to that channel.
You can probably achieve what you want within the AD mixer, but you'll need to edit FX sends and bleed levels on individual instruments, and limit the contribution of Overhead and Room signals to allow for more independent panning.
Life isn't always hard, but drum synth signal management can be.

You'll just have to do some experimentation with different AD and SONAR configurations to come up with something that works for you.