Cannot find links displayed on search results in SharePoint 2007

Question

Hi all, I have this problem when clicking a link that was displayed on the search results, when I click the link it says link not found. Here is the scenario.

1. We have calendar in SharePoint, sample link is "http://ecm/Lists/Calendar"
2. In the calendar, there is an entry with "W2" word in it.
3. In the search, we enter W2 as keyword and below link is displayed on the search results: http://ecm/Lists/Calendar/58_.000
4. When we click the link, it says link not found.
5. However when I removed the /58_.000 at the end of the URL, it displays the calendar. My question is, what is that /58_.000 at the end of the URL? And how can I fix this problem.

Thank you in advanced for your help.