您的local.xml应该位于布局文件夹下，而不是直接在主题文件夹下，而且您的代码块有拼写错误，显示为博克而不是代码块.

Your local.xml should be under layout folder not directly under theme folder, also your block has spelling mistake it says bock instead of block.

希望有帮助

NB不要忘了清除缓存.

N.B Don't forget to clear cache.

欢呼S