Call to a member function on a non-object

Hi, hope this question isn't too elementary but I'm new to php and PEAR and I'm following a few simple examples to simply connect to a local pgsql or mysql db and extract some data via a select. I know I'm connecting but can't figure out for the life of me why I'm getting the following error upon... $dbh->query($qry); gives me: Fatal error: Call to a member function on a non-object At least, the line referred to by this error is the line of the code copied above. Perhaps the problem is actually elsewhere. Can anyone advise? Docs, google searches have been no help. thx Eric more of the code... // this all seems to work as I get no error. Why is $dbh not holding a // connection object? $dbh = DB::connect($dsn); if(DB::isError($dbh)) { die ($dbh->getMessage()); } $qry = "SELECT * FROM tbl_moves"; // the line below is that which the error refers too $qryResult = $dbh->query($qry);