[otrs] POP3 Authentication Failed

Hi All I have configured POP3 setup in OTRS My POP3 server is opne access and i am able to use my POP3 account and everthing is fine But When I configured POP3 acount with OTRS it gives me the error *[Thu May 8 19:30:02 2008][Error][main::FetchMail][162] Auth for user ** root@tcshd.com* * failed!* The account details password everything is correct there nothing wrong in my POP3 account I am sure about this But I keep on getting the above error. Please any one tell me is there anything to be done kindly guide me Regards Sabeer