diff --git a/lualib/skynet.lua b/lualib/skynet.lua
index e039888a..009ea674 100644
--- a/lualib/skynet.lua
+++ b/lualib/skynet.lua
@@ -251,7 +251,11 @@ end
 function skynet.newservice(name, ...)
 	local param =  table.concat({"snlua", name, ...}, " ")
 	local handle = skynet.call(".launcher", "text" , param)
-	return handle
+	if handle == "" then
+		return nil
+	else
+		return string_to_handle(handle)
+	end
 end
 
 local function group_command(cmd, handle, address)
diff --git a/service/launcher.lua b/service/launcher.lua
index 98d9561f..6fc82bd7 100644
--- a/service/launcher.lua
+++ b/service/launcher.lua
@@ -49,7 +49,7 @@ skynet.start(function()
 			-- init notice
 			local reply = instance[address]
 			if reply then
-				skynet.redirect(reply.address , 0, "response", reply.session, skynet.pack(address))
+				skynet.redirect(reply.address , 0, "response", reply.session, skynet.address(address))
 				instance[address] = nil
 			end
 		else
@@ -60,7 +60,7 @@ skynet.start(function()
 				services[inst] = cmd
 				instance[inst] = { session = session, address = address }
 			else
-				skynet.ret(skynet.pack(nil))
+				skynet.ret("")
 			end
 		end
 	end)