Calendar doesn't show created nodes as dates

When I create a node , it doesn't appear on a calendar. Everything is set as explained in readme file.
In Arcal settings I choose a node type to be displayed in calendar. But, when I create a node (of that node type), nothing happens.
It is not displayed in calendar as a date link, like I saw in arcal screenshot (february 14. and 25.) http://drupal.org/node/383846.

Please help!

At the moment, I run my site on localhost, Windows platform, using Drupal 6