It is hard to say what the issue is as it is custom coding. I am limited on the support I can provide on it, but…
Are they the same theme?
I do not see any coding at all for the event.
If you type echo “here”; into the php does that show to at least verify it is pulling the right template?>
If it is correct have you tried WordPress Debug to see if any errors show:
Please follow the steps in the WordPress Debug Codex in the Example wp-config.php for Debugging section:
http://codex.wordpress.org/Debugging_in_WordPress
I maybe to help answer some questions more, but will be limited in troubleshooting this further.
Thanks