Only half of my keyboard plays sounds!

[ajari]

I have a USB Keyststion 61 key controller.Whenever I record all my sounds shift to either the lower or higher octaves of the keyboard, leaving the other side of the controller blank. This used to happen once I started on track 3 but now it is happening with all my tracks. I have a Roland XV 5050 and I'm running it with Cakewalk Sonar 2.0. I'm also useing a patchlist for the 5050 in Sonar, and I use the editor software that came with the 5050 to set up my MIDI channels. (within the 5050) Any advice would be great. Thanks in advance.