[xwiki-users] unable to login as admin.

I have installed xwiki 1.2.1 enterprize edition & using mysql 5.0 I am unable to login as admin.I have tried userName: Admin & password as admin But it says me wrong user name.. May be I have deleted some file. Can some one help me with it. Thanks in advance. Mailto: shruti.modi(a)tcs.com =====-----=====-----===== Notice: The information contained in this e-mail message and/or attachments to it may contain confidential or privileged information. If you are not the intended recipient, any dissemination, use, review, distribution, printing or copying of the information contained in this e-mail message and/or attachments to it are strictly prohibited. If you have received this communication in error, please notify us by reply e-mail or telephone and immediately and permanently delete the message and any attachments. Thank you