Why frp can't get http?

I'm trying use frp to get attach to the website of my no-pubilc-ip machine. Now my question is:

I can ssh through ssh -p 5040 root@XX.XX.XX.XX (XX.XX.XX.XX is my another machine's pubilc-ip) now.But I can't get my website through XX.XX.XX.XX:5020. And I can get it through 192.168.1.100. I don't know how to deal with it.

Below is my frp configuration (no ip and token): frps.ini

[common]
bind_port = 5001
dashboard_port = 5010
token = -----
dashboard_user = ----
dashboard_pwd = ---
vhost_http_port = 5020
vhost_https_port = 5030

frpc.ini

[common]
server_addr = XX.XX.XX.XX
server_port = 5001
token = ---------

[ssh]
type = tcp
local_ip = 127.0.0.1
local_port = 22
remote_port = 5040

[web]
type = http
local_port = 80
custom_domains = 192.168.1.100

And XX.XX.XX.XX:5020 show:

The page you requested was not found.
Sorry, the page you are looking for is currently unavailable.
Please try again later.

The server is powered by frp.

Faithfully yours, frp.