Custom Modpack Version Issues

[randomsnail]

Hai, Ive made a working custom modpack and i have created the server files but when i tried to connect to the server it says outdated client, I've tried making a lan world but when i try to connect on a different local PC i get outdated client error im using version 1.6.4 and i cant find any fixes and i've even tried remaking the modpack and server and i get the same errors can someone help?

 

-Lewis 

[plowmanplow]

If you post a link to your Technic pack page we can take a look and see if there is some inconsistency which might interfere with a server setup.