Failed to connect to the server

what operating system are you using?: windows
how did you install the modpack?: i tried everything
have you installed Java 8?: yes
when does the problem happen?: connecting to the server

CR launcher
[14:36:48] [main/INFO] [net.minecraft.client.multiplayer.GuiConnecting]: Connecting to, 25565
[14:37:04] [main/ERROR] []: Can't ping Internal Exception: An existing connection was forcibly closed by the remote host
Command Prompt
Pinging [] with 32 bytes of data:
Reply from bytes=32 time=69ms TTL=55
Reply from bytes=32 time=71ms TTL=55
Reply from bytes=32 time=70ms TTL=55
Reply from bytes=32 time=70ms TTL=55

Ping statistics for
    Packets: Sent = 4, Received = 4, Lost = 0
    (0% loss)
Approximate round trip times in milli-seconds:
    Minimum = 69ms, Maximum = 71 ms, Average = 70 ms

Hello! Yesterday i found that server, it is so impressive and inspiring, so, i tried to connect and see it by myself, but i got Connection Error, it is so sad, i am very villing to join the building process (i have some building experience from ravand server 3-4 years ago). As CR launcher saying that it can’t ping to server, i tried to do it by myself using Command Promt, log of CP attached (as i see there is not any problem in it). It is important to note, that i can easily connect to any other server, Darvin Reforged, for an example. I am hoping for support.