parameter issues in DBD:Oracle

I'm trying the following:

$sqcollision = "select reserved_id, reserver, purpose,  
to_char(starttime, 'HH:MI'), to_char(stoptime, 'HH:MI') from  
reservedroomtest where roomid in (?) and ((to_date(?, 'MM/DD/YYYY  
HH24:MM') <= starttime and to_date(?, 'MM/DD/YYYY HH24:MM') >=  
starttime) or (to_date(?, 'MM/DD/YYYY HH24:MM') >= starttime and  
to_date(?, 'MM/DD/YYYY HH24:MM') < stoptime))";

$csr2= $lda->prepare($sqcollision);

$csr2->execute($ridlist, $rstart, $rstop, $rstart, $rstart);
			if ( $ora_errstr ) {
    				print "params sent $ridlist; $rstart; $rstop; $rstart; $rstart  
<p> $ora_errstr\n";
    				exit;
			}

Which results in punting with the following error:

params sent 105, 106, 110; 03/23/2010 19:00; 03/23/2010 20:00;  
03/23/2010 19:00; 03/23/2010 19:00

ORA-01722: invalid number (DBD ERROR: error possibly near <*>  
indicator at char 135 in 'select reserved_id, reserver, purpose,  
to_char(starttime, 'HH:MI'), to_char(stoptime, 'HH:MI') from  
reservedroomtest where roomid in (:<*>p1) and ((to_date(:p2, 'MM/DD/ 
YYYY HH24:MM') <= starttime and to_date(:p3, 'MM/DD/YYYY HH24:MM') >=  
starttime) or (to_date(:p4, 'MM/DD/YYYY HH24:MM') >= starttime and  
to_date(:p5, 'MM/DD/YYYY HH24:MM') < stoptime))')

Does the DBD enclose all parameters in ''s?

Am I actually trying to execute:

select reserved_id, reserver, purpose, to_char(starttime, 'HH:MI'),  
to_char(stoptime, 'HH:MI') from reservedroomtest where roomid in  
('105, 106, 110') and ((to_date('03/23/2010 19:00', 'MM/DD/YYYY  
HH24:MM') <= starttime and to_date('03/23/2010 20:00', 'MM/DD/YYYY  
HH24:MM') >= starttime) or (to_date('03/23/2010 19:00', 'MM/DD/YYYY  
HH24:MM') >= starttime and to_date('03/23/2010 19:00', 'MM/DD/YYYY  
HH24:MM') < stoptime))

-- 
Bruce Johnson
University of Arizona
College of Pharmacy
Information Technology Group

Institutions do not have opinions, merely customs