Not sure. Compare the settings of a showing event and a non showing one to find out what the differences. Keep in mind that only 'not yet ended' events will show on map.
If you want a more advanced jevents map integration, consider the Geommunity maps + the jEvents plugin for Geommunity.
- Need help? Post the URL of the related page (eventualy as confidential info), it will help solve your issue faster.
- An error, notice or warning? report the exact message including the line number
- If you get a white page , enable error reporting and / or check your server error logs.