Enterprise Library 2006 -- Calling Oracle Procedure with Parameters

[TattedProgrammer]

Hello All,

I am completely stuck, I have tried for an entire day to get a simple
procedure call to my Oracle Db via the enterprise Library 06. I am not
an oracle fan to start, but have to deal with it for now. I am only
trying to retrieve data into a dataset from the oracle procedure,
nothing fancy! Here is my 100th version of code I have.
[ORACLE PROCEDURE I AM CALLING]

PROCEDURE "METLAB"."GET_LOOKUPS_PRC" (
"P_LOOKUP_TYPE" IN VARCHAR2, P_RETURNSET OUT SYS_REFCURSOR) IS

BEGIN

OPEN P_RETURNSET FOR

SELECT LOOKUP_ID,
LOOKUP_VALUE,
LOOKUP_TYPE
FROM MRLOOKUPS
WHERE LOOKUP_TYPE = P_LOOKUP_TYPE
ORDER BY LOOKUP_VALUE ASC;

NULL;

END "GET_LOOKUPS_PRC";
[code] [#01]
OracleDatabase db = new OracleDatabase(dbConn);
DbCommand objComm = db.GetStoredProcCommand("GET_LOOKUPS_PRC");

db.AddInParameter(objComm, "P_LOOKUP_TYPE",DbType.String,"NACE");
db.AddOutParameter(objComm, "P_RETURNSET",DbType.Object,8000);

objDS = db.ExecuteDataSet(objComm);
I would really like to continue writing the code similar to what I have
been doing with the Application Block previous. [HERE IS WHAT I AM USE
TO]
//Create Sql Parameters for SP
SqlParameter[] arrParms = new SqlParameter[3];
arrParms[0] = new SqlParameter("@p_UserName", arr[0]);
arrParms[1] = new SqlParameter("@p_DbId", arr[1]);
arrParms[2] = new SqlParameter("@p_AddRemove",
GetAddRemove(((CheckBox)sender).Checked));

//Update the records//
SqlHelper.ExecuteNonQuery(strConnection,
CommandType.StoredProcedure, "up_AddOrRemovePerms", arrParms);

[MY CLOSEST ATTEMPT FOR THE ORACLE SIDE OF IT .. STILL DOESN'T WORK]
[#02]
Dataset objDS = new Dataset;
OracleParameter[] arrParams = new OracleParameter[2];

arrParams[0] = new
OracleParameter("P_LOOKUP_TYPE",OracleType.VarChar ,50);
arrParams[1] = new OracleParameter("P_RETURNSET", OracleType.Cursor);
objDS = db.ExecuteDataSet("GET_LOOKUPS_PRC", arrParams);

THE ERROR FOR [#02]
"Object must implement IConvertible"

ANY DOCUMENTATION LINKS OR HELPFUL SOURCE CODE FOR ORACLE USING THE
ENTERPRISE LIBRARY WOULD BE MUCH APPRECIATED.

Thank in advanced!!
Spence