Cannot Sign in to Lync: User Information Appears to be Incorrect

I have problem with trying to login in to Lync 2010 from my computer. I tried reboot several times and tried changing many settings but no positive result. But, I can log into Lync from another computer successfully. My username and password are both correct. Then, what is wrong with my computer? I get following error message –
Cannot Sign in to Lync
The user name, password, or domain appears to be
Incorrect. Ensure that you entered them correctly. If the
Problem continues; please contact your support team

