[Help] ubuntu12.04pure-ftpdTLS connection failure

[Help] ubuntu12.04pure-ftpdTLS connection failure-Linux Enterprise Application-Linux server application information. The following is a detailed description. Sudo apt-get install pure-ftpd

The TLS settings are as follows:
# Implement TLS Certificate settings
Sudo openssl req-x509-nodes-newkey rsa: 1024-keyout/etc/ssl/private/pure-ftpd.pem-out/etc/ssl/private/pure-ftpd.pem
# The parameter is 1 implicit TLS and supports both encrypted and non-encrypted connections. Parameter 2 is the explicit TLS
Sudo echo '1'>/etc/pure-ftpd/conf/TLS

Ftp client error:
Status: Connecting 192.168.2.6: 990...
Status: Connection attempt failed "ECONNREFUSED-Connection refused by server ".
You can log on to a normal FTP connection.

Other settings:
# Solve the problem of using the FTP service for a local account
Echo "yes">/etc/pure-ftpd/conf/DontResolve
# Users whose group ID is 1000 are not restricted by their home directories. Other users are restricted by their home directories. (Check vim/etc/group and find that GID = 1000 is the user hr)
Echo "no">/etc/pure-ftpd/conf/ChrootEveryone
Echo "1000">/etc/pure-ftpd/conf/TrustedGID
# If the host name is not interpreted, selecting "yes" can greatly speed up ftp login.
Echo "yes">/etc/pure-ftpd/conf/DontResolve
# Maximum number of connections per IP Address
Echo "10">/etc/pure-ftpd/conf/MaxClientsPerIP
# Compatible with non-formal ftp clients such as ie
Echo "no">/etc/pure-ftpd/conf/BrokenClientsCompatibility
# Maximum bandwidth of all users (kb/s), including anonymous users.
Echo "800">/etc/pure-ftpd/conf/UserBandwidth