failed to add "require" to the lua script

[dzzzc]

for example, I add “require("hello2-1")” to the “hello2-3.lua” ，failed to execute "luerl:do" , but only add "require("math")" success

lua:

require("math")
require("hello2-1")

function no() print("(16) No!") end

print(math.abs(-15))
print("(15) Maybe ...")

return "(X) Yes!"

erl:

>os:putenv("LUA_LOAD_PATH","C:/Users/admin/Desktop/luerl-0.4/examples/hello"). 
>{ok,Function,FullName,State}=luerl:path_loadfile("hello2-3.lua",luerl:init()).
>luerl:do(Function,State). 

fail info:

exception error: {lua_error,
                     {no_module,<<"hello2-1">>,
                      <<"'./hello2-1.lua' './hello2-1/init.lua' ">>},