老师，我运行脚本时，报错，如下，怎么回事，可能什么原因，求指点：

ConnectionRefusedError: [WinError 10061] 由于目标计算机积极拒绝，无法连接。

调试是 dr = webdriver.Remote('http://127.0.0.1:4723/wd/hub', desired_caps)这句报错了

我Appium启动情况：

> Launching Appium server with command: D:\Program Files\Appium\node.exe lib\server\main.js --address 127.0.0.1 --port 4723 --platform-name Android --platform-version 19 --automation-name Appium --device-name "emulator-5554" --log-no-color

> info: Welcome to Appium v1.4.16 (REV ae6877eff263066b26328d457bd285c0cc62430d)

> info: Appium REST http interface listener started on 127.0.0.1:4723

> info: [debug] Non-default server args: {"address":"127.0.0.1","logNoColors":true,"deviceName":"emulator-5554","platformName":"Android","platformVersion":"19","automationName":"Appium"}

> info: Console LogLevel: debug