Help Updating Server Mods

[ThunderJunk]

Voltz says it needs to update a few mods, so I downloaded the updated mods. Now when I try joining my server its saying the server is missing mods or the mods are an outdated version. Am I doing something wrong? Help please. I want to make obsidian tools and armor. I read online the version of the Mechanism mod is the problem. I'm at a loss. But I still want all the updates.