内网（连接家里的wifi）可以正常使用语音解析和合成,但把手机wifi关了转用3G网络就出现下面的异常提示！求解决方法。

01-06 23:50:30.139: E/SpeechSynthesizer|EmbeddedSpeechDataOrganizer.java:156(29067): bdTTSGetAuthorize failed!

01-06 23:50:30.141: E/SpeechSynthesizer|AutoSwitchSpeechSynthesizer.java:514(29067): synthesize error, code: 1001

01-06 23:50:30.517: E/SpeechSynthesizer|SpeechSynthesizer.java:421(29067): error.code = 1001, error.description = 授权文件下载失败