ADO and Oracle- Trouble executing stored procedures

I'm using ADO against an Oracle 10g database.

2 problems:
1.) calling the following stored procedures throws an exception on the last line in the code below (DB_E_ERRORSINCOMMAND; IDispatch error #3092):

Code:

---

        ADODB::_CommandPtr pCommand;  // Stored Procs
        ADODB::_RecordsetPtr recordSet;

        pDBConn.CreateInstance( __uuidof( ADODB::Connection ) );
        _bstr_t connectString = GetConnectString();
        pDBConn->Open( connectString, "", "", 0);

        pCommand.CreateInstance(__uuidof(ADODB::Command));
        pCommand->ActiveConnection = pDBConn;
        pCommand->CommandType = ADODB::adCmdStoredProc;
        pCommand->CommandText = _bstr_t("sp_getcard");

        VARIANT vCardNum;
        vCardNum.vt = VT_BSTR;
        vCardNum.bstrVal =  _bstr_t( "100" );

pCommand->Parameters->Append(pCommand->CreateParameter(_bstr_t("CardNum"),ADODB::adVarChar,ADODB::adParamInput,50,vCardNum));
        recordSet = pCommand->Execute( NULL, NULL,ADODB::adCmdStoredProc);

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This procedure compiles within Oracle; the examples I've seen on the web lead me to believe that my approach should work. Can anyone help or direct me any ADO + Oracle (not ADO.NET) sites that may shed light on this.

Here's the actual Stored Proc:

( CardNum IN VARCHAR2, RC1 IN OUT Omwb_emulation.globalPkg.RCT1)AS BEGIN OPEN RC1 FOR SELECT LastName, FirstName, CardNumber, UserDate FROM Addresses WHERE CardNumber = CardNum; END sp_getcard;

[ moved thread ]

OK, let me ask this then:
Has anyone every use ADO to retrieve data from an Oracle stored procedure?

Take a look at How To Retrieve Recordsets from Oracle Stored Procedures Using ADO and Using stored procedures with ADO

thanks. The second link didn't work when I downloaded and ran the sample. I'm looking @ the second one ( I'm a VC++ guy, not VB, so will have to parse this one out ). Maybe it's the PL/SQL that is the problem ( even though the stored proc compiles in Oracle ).