I can'T play with orespawn software

Hi,guys I have a problem When I want to play with vanilla software I can play but I can't play when I want to play with Orespawn it stucks and it says'joining in..'
Here is a ss:https://imgur.com/QLhiMpo Sorry for my bad english guys.

I think I don'T have connection problems and my world isn'T too big(I didn'T upload a world)
I have 16mbps connection.
There is a ss about my internet speed https://imgur.com/a/xivlb
Thanks for helping me

I just looked console.Here is the log:
[18:20:24] [Server thread/INFO]: Starting minecraft server version 1.7.10
[18:20:42] [Server thread/INFO]: Loading properties
[18:20:42] [Server thread/INFO]: Default game type: SURVIVAL
[18:20:42] [Server thread/INFO]: Generating keypair
[18:20:43] [Server thread/INFO]: Starting Minecraft server on *:46111
[18:20:43] [Server thread/WARN]: **** SERVER IS RUNNING IN OFFLINE/INSECURE MODE!
[18:20:43] [Server thread/WARN]: The server will make no attempt to authenticate usernames. Beware.
[18:20:43] [Server thread/WARN]: While this makes the game possible to play without internet access, it also opens up the ability for hackers to connect with any username they choose.
[18:20:43] [Server thread/WARN]: To change this, set "online-mode" to "true" in the server.properties file.
[18:20:43] [Server thread/INFO]: Preparing level "world"
[18:20:45] [Server thread/INFO]: Preparing start region for level 0
[18:20:46] [Server thread/INFO]: Preparing spawn area: 9%
[18:20:47] [Server thread/INFO]: Preparing spawn area: 40%
[18:20:48] [Server thread/INFO]: Preparing spawn area: 77%
[18:20:48] [Server thread/INFO]: Done (4.840s)! For help, type "help" or "?"
[18:20:48] [Server thread/INFO]: Starting GS4 status listener
[18:20:48] [Query Listener #1/INFO]: Query running on 0.0.0.0:46111
[18:23:51] [Server thread/WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 2687ms behind, skipping 53 tick(s)

I just selected orespawn software and when the server started I started 1.7.10 version of minecraft and I tried to join my server.Sorry for my bad english.SS:https://hizliresim.com/kXXX1v

So,I must download the mod.Thanks for helping me very thx it worked!