Android Emulator default browser can't take screenshot - selenium

Question

My Emulator android phone has android default browser, when appium test the android default browser, it can't take screenshot on failure using TakesScreenshot.How can I to solve it.
I am using Selenium Remote Webdriver as driver instance
public synchronized static void captureScreenshot(WebDriver driver, String screenshotName) {
try {
TakesScreenshot ts = (TakesScreenshot) driver;
File source = ts.getScreenshotAs(OutputType.FILE);
FileUtils.copyFile(source, new File("./Screenshots/"
+ screenshotName + ".png"));
System.out.println("Screenshot taken");
filePath=timestamp()+ screenshotName + ".png";
} catch (Exception e) {
System.out.println("Exception while taking screenshot "
+ e.getMessage());
}
}
CONSOLE LOGS :
Exception while taking screenshot An unknown server-side error occurred while processing the command. Original error: Could not proxy. Proxy error: New Command Timeout of 60 seconds expired. Try customizing the timeout using the 'newCommandTimeout' desired capability (WARNING: The server did not provide any stacktrace information)
Command duration or timeout: 660.36 seconds
Build info: version: '2.44.0', revision: '76d78cf323ce037c5f92db6c1bba601c2ac43ad8', time: '2014-10-23 13:11:40'
System info: host: 'DocASAP-mac-mini.local', ip: '192.168.1.45', os.name: 'Mac OS X', os.arch: 'x86_64', os.version: '10.11.5', java.version: '1.7.0_79'
Session ID: f8bcc2d5-a00d-43c5-8a8a-157d2fbe6260
Driver info: org.openqa.selenium.remote.RemoteWebDriver
Capabilities [{platform=ANDROID, javascriptEnabled=true, acceptSslCerts=true, browserName=Browser, networkConnectionEnabled=true, desired={newCommandTimeout=60, platform=ANDROID, autoAcceptAlerts=true, acceptSslCerts=true, deviceName=192.168.56.101:5555, platformName=Android, browserName=Browser, setAcceptUntrustedCertificates=true, version=5.1.0}, locationContextEnabled=false, deviceUDID=192.168.57.101:5555, version=5.1.0, newCommandTimeout=60, platformVersion=5.1, autoAcceptAlerts=true, databaseEnabled=false, deviceName=192.168.57.101:5555, platformName=Android, webStorageEnabled=false, setAcceptUntrustedCertificates=true, warnings={}, takesScreenshot=true}]