Taskbar orientation problem on iPad

I encounter a weird problem, the interface orientation of my game is Landscape, and when i sweep from right to left on the iPad display, the task-bar appears on the right side, and i sweep from top to bottom, the previous app will appear. This is wrong, the right behavior should be sweeping L-R bring out the previous app and sweeping B-T will bring out the task-bar on the bottom.
I’m using cocos2d-1.0.1-x-0.11.0 currently. Anyone encounter the same problem?