Call Oracle Stored Procedure With Output Refcursor From Ssis

I would like to call a oracle stored procedure which looks like this

Create procedure in oracle sql plus


CREATE OR REPLACE PACKAGE GroupsPackage
AS
TYPE CURSOR_TYPE IS REF CURSOR;
PROCEDURE usp_SelectGroups (results_cursor OUT CURSOR_TYPE);
END;
/
CREATE OR REPLACE PACKAGE BODY GroupsPackage
AS
PROCEDURE usp_SelectGroups (results_cursor OUT CURSOR_TYPE)
AS
BEGIN
OPEN results_cursor FOR
SELECT GroupID, GroupName, GroupDescription, LastUpdateDate
FROM Groups
ORDER BY GroupName;
END;
END;
/


Execute procedure in oracle sql plus

set autoprint on;
var x refcursor;
groupspackage.usp_selectgroups(:x);
end;
/

This works in sql plus. But when I try to run the same (or tried everything) in the execute statement in ssis using execute sql task, I am not able to make it work. I am getting an error message. Please advice, what am I doing wrong. Or is this possible or is there any other way to get this working.