How to reload the images when level comple(Andengine)

I am developing a game using andengine. i place this coding

//

pr开发者_运维知识库ivate TiledTextureRegion levelRegion;

int level;

//In  onLoadResources()

  this.mTexture = new Texture(2048, 512);            
        this.levelRegion=TextureRegionFactory.createFromAsset(this.mTexture, this, 
"bg"+level +".png",0,0);      

this.mEngine.getTextureManager().loadTexture(this.mTexture);

When level complete , i increased the level and i try call again onLoadResources(). I got error and screen in blank.. How to fix this problem .