Done Can't find the server

My friend just downloaded the modpack from MyM launcher, so i give hm the server's adress, but with him, the server can't be found, still pinging, and the server give no answer, don't know how to fix it :/

 

Yep now he can, thanks for this !

 

Oops, he have the same problem now, he played 2/3 hours all was good, but know he have the same problem with all adress possible :/

 

Yep but he can connect at other servers, while MyM server still pinging, he can connect some time the morning