DDL Triggers in SQL Server 2008

Hii I was just reading an article about DDL triggers on MSDN.
I created a trigger on my test server




CREATE TRIGGER DDL_TRIGGER_1

ON DATABASE
FOR DDL_DATABASE_LEVEL_EVENTS
AS
ROLLBACK
RETURN

And i found that even when i am using sa login for performing any kind of DDL operation ie CREATE TABLE
trigger is fired not allowing me to create table.
How come SQL server restricting SA while creating tables.
and what is the easiest way to view ddl triggers definition.

You have not mentioned anything about SA in your trigger.