Warning file not found.....help me

So i’m using Cocos2d and i keep getting the error

Cocos2d: cocos2d: CCFileUtils: Warning file not found: scene_1_midground-ipad.png
Cocos2d: cocos2d: CCFileUtils: Warning file not found: scene_1_midground-ipad.png
Cocos2d: cocos2d: CCFileUtils: Warning file not found: scene_1_midground-ipad.plist
Cocos2d: cocos2d: CCFileUtils: Warning file not found: scene_1_midground-ipad.plist
Cocos2d: cocos2d: CCFileUtils: Warning file not found: scene_1_foreground-ipad.png
Cocos2d: cocos2d: CCFileUtils: Warning file not found: scene_1_foreground-ipad.png
Cocos2d: cocos2d: CCFileUtils: Warning file not found: scene_1_foreground-ipad.plist
Cocos2d: cocos2d: CCFileUtils: Warning file not found: scene_1_foreground-ipad.plist
Cocos2d: cocos2d: CCFileUtils: Warning file not found: role_zhengtai_stand-ipad.plist
Cocos2d: cocos2d: CCFileUtils: Warning file not found: role_zhengtai_stand-ipad.plist
Cocos2d: cocos2d: CCFileUtils: Warning file not found: role_zhengtai_stand-ipad.png
Cocos2d: cocos2d: CCFileUtils: Warning file not found: role_zhengtai_stand-ipad.png
Cocos2d: cocos2d: CCFileUtils: Warning file not found: role_zhengtai_stand-ipad.plist
Cocos2d: cocos2d: CCFileUtils: Warning file not found: role_zhengtai_stand-ipad.plist
Cocos2d: cocos2d: CCFileUtils: Warning file not found: role_zhengtai_stand-ipad.plist

Engine will find xxx-ipad.png/plist first if it runs on iPad.
If it didn’t find the resources, it will use xxx.png/plist instead.

Please refer to the implementation of CCFileUtils for detail information.

thanks.