driver.startActivity 启动app出现 An unknown server-side error occurred while processing the command

driver.startActivity("com.xxx.module.xxx", "com.xxx.module.xxx.hibox.ui.entry.EntryActivity");

[INFO ] org.openqa.selenium.WebDriverException: An unknown server-side error occurred while processing the command. Original error: Error occured while starting App. Original error: com.xxx.module.xxx/com.xxx.module.xxx.hibox.ui.entry.EntryActivity or .hibox.ui.entry.EntryActivity or .com.xxx.module.xxx.hibox.ui.entry.EntryActivity never started (WARNING: The server did not provide any stacktrace information)
Command duration or timeout: 21.93 seconds
Build info: version: '2.48.2', revision: '41bccdd10cf2c0560f637404c2d96164b67d9d67', time: '2015-10-09 13:08:06'
System info: host: 'FC000329PC1', ip: '169.254.242.52', os.name: 'Windows 7', os.arch: 'x86', os.version: '6.1', java.version: '1.8.0_45'
Driver info: io.appium.java_client.android.AndroidDriver