I think there is a bug in actionItem.php Line 88 (Delete procedures)
It reads :
$result = mysql_query("select studyuid from series where uid='$seriesuid';");
I think it should read :
$result = mysql_query("select studyuid from series where uid='$seriesid';");
her is an "u" too much in '$seriesuid'
This fix worked fine for me

Erik