Custom date/time fields on the icalender

[atopcu]

Hello. I installed this plugin in to my redmine instance some time ago. My instance is:

Environment:
Redmine version 2.5.2.stable.13333
Ruby version 2.0.0-p481 (2014-05-08) [x86_64-linux]
Rails version 3.2.19
Environment production
Database adapter Mysql2

my redmics version is 3.0.0.dev. I was tried to install latest version but not work in my instance and I returned to 3.0.0.dev again.

I need to see some datetime that stored in custom fields on the icalender. It is possible ?

Thanks for this plugin.
Regards.