check out the settings in: /etc/xinet.d/wu-ftped
Mine looks like bellow, only allow connection from IP address
192.168.1.61, you can trust the whole local net if you wish, just modify so it look something like this "only_from = 192.168.1.0/24"
If you still get connection refused, then edit your /etc/hosts file and put your Windoze machine's IP address there, because that's likely the ftp server unable to resolve the incoming ip, this is common if you are on private IPs.
disable = no
socket_type = stream
wait = no
user = root
server = /usr/sbin/in.ftpd
server_args = -l -a
log_on_success += DURATION USERID
log_on_failure += ATTEMPT HOST RECORD USERID
nice = 10
only_from = 192.168.1.61