Dns on subdomain

i will open subdomain o cpanel
new.example.com
my dns is on cloudflare
i can not see subdomain live. i see
Hmm. We’re having trouble finding that site.

We can’t connect to the server at new.wxample.com.
If that address is correct, here are three other things you can try:
Try again later.
Check your network connection.
If you are connected but behind a firewall, check that Firefox has permission to access the Web.
pn website i found this link
Delegating Subdomains Outside of Cloudflare – Cloudflare Help Center

i will enter 2 lines, ns1 and ns2 and not take any effect
do you something know where is my problem?
regarsd
vlaada

What is the real hostname?

hello
today on google i will found something and its work
on host records for subdomain i will put this line and this is work on my host on Hostgator
A subdomain xxx.xxx.xxx.xxx (IP adress of host) Auto Proxied