TableQuery Help

I am trying to set up a table query with no luck. Oracle is the back end database.

The following works:

FreeformQuery q1 = new FreeformQuery("SELECT * FROM ATLANTIS.drop_down_master", connectionPool, "DROP_DOWN_MASTER_ID");

But this is not what I want, I want to use a TableQuery:

TableQuery t1 = new TableQuery("ATLANTIS.drop_down_master",connectionPool, new OracleGenerator());

This TableQuery throws a table not found error. What am I doing wrong?