Problems with dbmreplace() and dbmdelete()

Good day (or whatever), I have looked for this problem in every german archive and in the german mailinglist, but noone knew an answer. following problem: I want to use a dbm-database, I can open it, I can insert something and I can close it without problems, but if i try to replace or delete a key, I only get an error-alert. E.g.: <?php $dbh = dbmopen( "./data/produkte", "c" ) or die( "Couldn't open DBM-database!" ); // This is running! dbminsert( $dbh, "Sonic Screwdriver", "23.20" ) or die("Insert not possible!"); // This is running, too! dbmreplace( $dbh, "Sonic Screwdriver", "25.20" ) or die("Replace not possible!"); // Here I get the error-alert! dbmdelete( $dbh, "Sonic Screwdriver" ) or die("Delete not possible!"); // Here I get the error-alert, too! dbmclose( $dbh ); ?> (sorry for my english and thank you for reading this mail) Have a good night or day or whatever Uli Lehner