Firefox not getting launched from Ant and TestNg combination - selenium-webdriver

Question

I am using Selenium 2.53.0 and Firefox version is 46.0.1.
Please find the code below which i am running from Ant :
#Test
public void Browser() {
// Luanching Firefox browser
FirefoxDriver driver=new FirefoxDriver();
driver.get("http://flipkart.com");
driver.quit();
}
Note:
If I run the code from eclipse working as expected without any issues. But if I run the same code from Ant using Build.xml, I am getting below error:
**org.openqa.selenium.WebDriverException: org.openqa.selenium.WebDriverException: Unable to bind to locking port 7054 within45000 ms**
System info: os.name: 'Windows 7', os.arch: 'x86', os.version: '6.1', java.version: '1.8.0_111'
Driver info: driver.version: firefox
System info: os.name: 'Windows 7', os.arch: 'x86', os.version: '6.1', java.version: '1.8.0_111'
Driver info: driver.version: firefox
at org.openqa.selenium.firefox.internal.ExtensionConnectionFactory.connectTo(ExtensionConnectionFactory.java:46) at org.openqa.selenium.firefox.FirefoxDriver.connectTo(FirefoxDriver.java:139)
at org.openqa.selenium.firefox.FirefoxDriver.<init>(FirefoxDriver.java:129)
at org.openqa.selenium.firefox.FirefoxDriver.<init>(FirefoxDriver.java:109)
at test.NewTest.Browser(NewTest.java:10)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.testng.internal.Met
Please suggest a solution how to resolve above mentioned issue ?