ciao a tutti

ricevo questo errore
codice:
Parse error: parse error in c:\appserv\www\universita\connections\connaccess.php on line 3
ma non capisco perchè

codice:
<?
$path= "C:\AppServ\www\universita\Connections\";
$db_name="qsm.mdb";
$dsource=$path.$db_name;
$cn_string="Provider=Microsoft.Jet.OLEDB.4.0;";
$cn_string.="Data Source=$dsource;";
....
grazie mille