odbc_ calls and "complex" queries (e.g. union

Hi, I have installed on an NT box a binary PHP4 installation. It seems that executing a "select" on a "composite" query in my Access database returns an error. For instance, I have noticed that this occurs for UNION queries, or joins between a query and a table etc. I get things like: "SQL error: [microsoft][odbc ms access driver] too few parameters. expected 1..." Could somebody please confirm if this is a known bug with PHP, or maybe the MS Access driver...(if not, any hints as to what my error might be due to) ? Thanks -- Andrea Giacomelli