When attempting to log on to Contact Center Manager Administrator (CCMA) for the first time using internet Explorer 7.0,

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When attempting to log on to Contact Center Manager Administrator (CCMA) for the first time using internet Explorer 7.0, a new supervisor sees the message
"ERROR:UNKNOWN!" on the login page. None the other supervisors report the issue, and you have logged onto CCMA yourself with the "webadmin" account and verified that it is functioning normally.
What is causing this problem and how should it be corrected?

A. The CCMA server does not have a Windows Language Pack installed for the language assigned to the supervisor's account in Access and Partition Management. You must either install the appropriate language pack or change the supervisor's language to a language that does have Windows language pack installed.
B. The supervisor is connecting to the CCMA website while logged into the computer as a non-domain user. You must update the Anonymous access configuration for the default website to use the "IUSR_SWC" credentials or ensure that all supervisors only use domain accounts when accessing CCMA.
C. The character encoding is set to an incorrect value in the supervisor's web browser. Set the encoding in Internet Explorer to "Western European" and then reload the website.
D. The URL for the CCMA server has not been added to the list of Trusted Sites in the supervisor's web browser. Add the CCMA URL to the list of Trusted Sites,