Selenium script too slow with new FirefoxDriver()

I doing automation on a particular website(say xyz.com). When I open the URL manually, it lands me onto a login page as expected and I am able to login there as well.

However, when I am automating the scenario by creating new instance of Firefox using new FirefoxDriver(), login page opens quickly but; when I click on login button it takes almost 2 minutes to navigate to a homepage. I tried using a new profile but it didnt help. I am using Selenium 2.44.0 on MAC with Java(Eclipse). Please help.