set_socket_blocking($socket, False) doesn't work !

I Guys, I'm using PHP4.0.0 and try to connect to a home made application via TCP/IP to send requests and get answers ... It seems that the PHP function fputs is working fine because my daemon application is receiving messages from the PHP script ! But the answer comming from the application is not received by the script. I put a while loop like this : $fp = fsockopen("localhost", "8000", &$errno, &$errstring, 3); if(!$fp) { echo "$errstr ($errno)<br>\n"; } else { set_socket_blocking($fp, False); // This is supposed to put the socket to non blocking mode ! fputs($fp, $message); // Send something ... while (!feof($fp)) { // Wait for the answer ... $string .= fgets($fp, 60); // I also tried $string .= fread($fp, 20); } } It seems that the PHP engine if waiting for something even if I set the socket to non Blocking ! If someone could help ... I will appreciate ... Greg Sovaridis, gs@tradeware.be