Hello, I need help

I need take datas from a Database where the datas are binary type. I have tried with

select = "{CALL PrnSelectSNull(CONVERT(binary[6],'" + m_LanguageCode + "'),";
select += "CONVERT(binary[18],'" + m_Titel + "'),CONVERT(binary[18],'" + m_Datum + "'))}";
SNullSet.Open(CRecordset::forwardOnly, select,CRecordset::readOnly);

where SNullSet is a recordSet, but give me an error in assignment when try to open the recordSet.

Anybody can help me?

Thanks,
Reyes