报错，大侠看看哪里有问题？（掌上mud）

yyzq

local shu = ""
if "%1" == "易经" then
  shu = "yi jing"
elseif "%1" == "推背图" then
  shu = "tuibei tu"
elseif "%1" == "洛书" then
  shu = "luo shu"
elseif "%1" == "河图" then
  shu = "he tu"
elseif "%1" == "奇门遁甲” then
  shu = "qimen dunjia"
end
Execute("du "..shu.." for 1")