Providing more and specific info would be helpful. Like what you tried and
what happened (with specific messages). Viewing the source from resultant
pages will help you find some erors. Look for html comments containing
error messages.
It would appear that you have a permssions problem on the database. Did
you get any permission warning during the installation procedure?
You need to make sure the database is accessable by the webinator texis cgi
program. The simplest way to do this is to make the "texis" executable setuid
to the userid you are using to manage the database: chmod u+s cgi-bin/texis
Or to make the entire database world accessable: chmod a+rw webinator/db/*