64Bit Fedora and Proftp

Dear you, Mine is 64Bit Fedora 11.... /etc/xinetd.d/proftpd service ftp { disable = no flags = REUSE socket_type = stream wait = no user = root server = /usr/sbin/proftpd log_on_success += DURATION USERID log_on_failure += USERID nice = 10 } Firewall Setting ( iptables ) : #!/bin/bash # modprobe ip_tables # modprobe ip_nat_ftp # modprobe ip_conntrack # modprobe ip_conntrack_ftp iptables -F iptables -X iptables -F -t nat iptables -X -t nat iptables -F -t mangle iptables -X -t mangle iptables -P INPUT DROP iptables -P OUTPUT ACCEPT iptables -P FORWARD ACCEPT iptables -t nat -P OUTPUT ACCEPT iptables -t nat -P PREROUTING ACCEPT iptables -t nat -P POSTROUTING ACCEPT iptables -t mangle -P PREROUTING ACCEPT iptables -t mangle -P POSTROUTING ACCEPT iptables -t mangle -P INPUT ACCEPT iptables -t mangle -P OUTPUT ACCEPT iptables -t mangle -P FORWARD ACCEPT iptables -A INPUT -i lo -j ACCEPT iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT # ( FTP services ) : iptables -A INPUT -i $ext_int -p tcp --dport 20 -d $ext_add -j ACCEPT iptables -A INPUT -i $ext_int -p tcp --dport 21 -d $ext_add -j ACCEPT /etc/proftpd.conf ServerType inetd DefaultServer on UseReverseDNS off IdentLookups off Port 21 Umask 022 MaxInstances 30 MaxClients 50 User nobody Group nobody TimeoutIdle 1800 TimeoutStalled 1800 TimeoutNoTransfer 1800 TimeoutLogin 1800 TimesGMT off AllowRetrieveRestart on AllowOverwrite on AllowStoreRestart on <Directory /*> AllowOverwrite on <Limit LOGIN CWD MKD RMD RNFR RNTO DELE STOR RETR READ SITE_CHMOD> # Order Deny,Allow AllowUser xxxx IgnoreHidden on DenyAll </Limit> </Directory> When upload around more than 10MB data to the ftp server, there is error messages as the following : STOR MySQL-client-5.1.44-1.glibc23.x86_64.rpm 150 Opening BINARY mode data connection for MySQL-client-5.1.44-1.glibc23.x86_64.rpm Transmitted 7359458 bytes in 155.5 secs, (464.13 Kbps), transfer succeeded ! Receive error: Blocking call cancelled So, would you mind to help ? Thanks ! Edward.