ubuntu 7.10 server edition

Tue Apr 22 05:21:23 UTC 2008

After installing my ubuntu server above and rebooting the system, I come to a section where I have to log in, and even though I use the username I created during the server installation and password,  I can't log in. Why? 
Any help appreciated,
R. Molina
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.ubuntu.com/archives/ubuntu-users/attachments/20080422/f57ad9d3/attachment.html>