Please check out the Angelus (Children's) Choir Calendar of events for 2011-2012 which included the tryout information.
Select Music under Ministries, then Angelus (Children's) Choir and view the Angelus Calendar of Events 2011 - 2012 under Forms on the right of the page
-or- click on the following link to be at the Angelus (Children's) Choir web page