If you get error WRONG PASSWORD you should check login.
like ftp://George@192.168.1.155/
OR
# Minimum UID for an authenticated user to log in.
MinUID 100
in config file. If it is higher than a users UID it wil not work.
If you have SElinux problem, first check if pure-ftpd takes username and password from pure-ftpd file if not set up...
# PureDB user database (see README.Virtual-Users)
PureDB /etc/pure-ftpd/pureftpd.pdb
# Path to pure-authd socket (see README.Authentication-Modules)
# ExtAuth /var/run/ftpd.sock
# If you want to enable PAM authentication, uncomment the following line
# PAMAuthentication yes
# If you want simple Unix (/etc/passwd) authentication, uncomment this
# UnixAuthentication yes