downloadVoice无法正常下载语音

 微信下载语音接口downloadVoice无法正常下载语音，麻烦指导一下。

 

  开发工具：

      {"errMsg":"downloadVoice:ok","localId":"wxLocalResource://voiceLocalId1234567890123"}

 

  手机：

      {"errMsg":"downloadVoice:fail"}