I am building cucumber/webdriver script in java.

The login page takes email and password to sign in...

The script fills the emailid and password

But the click on SignIn button doesnt work.. 

Below is the link
<http://accountsdemo.herokuapp.com/users/sign_in>

Have tried
By signInLocator=By.name("commit");
and also 
By signInLocator=By.xpath("//input[@type='submit']");

Below is the Java code for the same

```
public void the_user_click_sign_in() throws Throwable{
    driver.findElement(signInLocator).click();
}

```

Not sure if i am doing anything wrong here