picture which read from plist file can repeat maps?

cocos2d-x C++
#1

CCSprite* shelfBG = CCSprite::spriteWithFile(RES_BOOK_SHELF_BG, r);
ccTexParams tp = {GL_LINEAR, GL_LINEAR, GL_REPEAT,GL_REPEAT};
shelfBG->getTexture()->setTexParameters(&tp);

I want repeat maps，but if the CCSpritewhick read from plist,it is invalid.