Error caling a public constructor in a TC ran using jacoco:cover

When i am running my play code with jacoco:cover, the test cases execution are failing when the constructor is called.

SImply put: My test code is like

@Test
    public void ValidSessionIdFindBySessionId() throws Exception 
    {
 RightnowAccount rightnowAccount = new RightnowAccount("Login", "Password", 123, "SessionId");

     }

My Class and the constructor:

public class RightnowAccount extends Model
{
    private static final Logger logger = org.apache.log4j.Logger.getLogger(RightnowAccount.class);
    @Id
    public String login;
    public String password;
    public int accountId;
    String sessionId;
    Timestamp createdTimeStamp;
    Timestamp updatedTimeStamp;



    public RightnowAccount (String login)
    {
        this.login = login;
    }
    public RightnowAccount (String login,String password,int accountId,String sessionId)
    {
        this.login = login;
        this.password = password;
        this.accountId = accountId;
        this.sessionId = sessionId;
    }
}

When i am running the test code as play:cover, my test case fails with error:

error] Test com.flipkart.rightnow.connection.RightnowAuthTest.ValidSessionIdFindBySessionId failed: missing behavior definition for the preceding method call:
[error] RightnowAccount.$jacocoInit()
[error] Usage is: expect(a.foo()).andXXX()
[error]     at org.easymock.internal.MockInvocationHandler.invoke(MockInvocationHandler.java:42)