here is my query

$sql  =  'SELECT *
FROM Orders 
INNER JOIN [Order Details] ON Orders.OrderNumber = [Order Details].OrderNumber
WHERE 
Orders.CartID =2 
AND [Order Details].Option10 Is Null  
AND [Order Details].Status="Shipped"';

this queries when entered in MS_Access sql view, returns the correct results, but when I copy and paste the same query in my php script, it fails and gives the error

Too few parameters, expected 1...

although data is there, query is working in access...

Please note if I omitted on AND condition, it works eg if I removed shipped conidtion or is null condition, it works then too..

any hint? whats wrong with it?? any help?thanks