Issue with Entity reference prepopulate

Hi,

Actually I am facing a problem with a complex project:
I have installed the following modules under Drupal 7:
- OG
- Entity reference prepopulate
- Calendar event
- Date API
- Calendar

the Event Calendar- Month view is placed in the Group node page using quick tabs.

the Entity reference prepopulate option is activated on the Groups audience (og_group_ref) in the Event Calendar node bundle, also field with the OG context option activated.

when creating any group node with the Entity reference prepopulate activated, all pages and links are working fine with, even from the very quicktab instance placed in the group page.

My problem is: when trying to create content from the Event Calendar-Month view the Entity Peference Prepopulate is not working.

Many thanks.