[opencms-dev] Guest problem

[vitlacil at tin.it]

hi everybody,
I'm trying to create a new Guest user (Guest group) but when I try to 
login with his username and password i get this error: 

com.opencms.core.CmsException: 10 Unknown User. Detailed error: [OpenCms
login failed]. 
	at com.opencms.workplace.CmsLoginNew.getContent(CmsLoginNew.java:150)......

I haven't change anything, everything is still installation default. 
I'm only trying to understand what can see and do guest user
in default environment.

Dejan