Outlook not opening.

Hi Team,

I installed 0ffice 2013 in my system recently. When I try to open outlook it  prompts for credentials. If we give the correct credentials also, it again prompts for the credentials. If click cancel button it displays a message box saying "Cannot start Microsoft Outlook. Cannot open the outlook window. The set of folders cannot be opened. The attempt to log on to Microsoft Exchange has failed.". Please help me in this regard.

Thanks in advance.

Regards,

M srimathi