Problem With ora_do

I'm having a weird problem with ora_do. It works fine as long as I don't have a "WHERE" clause in the query. For example: select * from table_name works just fine but .... select * from table_name where col_name = value returns nothing. However, if I use ora_open, ora_parse and ora_exec everything works fine. I'm running on Compaq Tru64 ver 5.1. I compiled PHP with gcc 3.1. I'm not getting any errors or warnings and nothing is being logged in the Apache logs. I guess it's not a big deal since I have been able to work around it, but it would be nice to know what the problem is. Thanks, Dean