dynamic sql to return a result set

I'd like to have a stored proc return a result set (via a parameter) using dynamic sql. Can someone help. This is what i have:

CREATE OR REPLACE PACKAGE "ODB"."MYTYPES" as

    type cursorType is ref cursor;
end;

CREATE OR REPLACE PROCEDURE "ODB"."TRAX_CUST_RELEASE"     (RESULT_SET in OUT ODB.myTypes.cursorType) is
s_sql varchar2(100);
BEGIN
s_sql := ' select * from odb.trax_customer_release '; EXECUTE IMMEDIATE s_sql into RESULT_SET; END; it gives me: ORA-00932 inconsistent datatypes.

--
Luciano Belotto
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