Missing mod Sponge at client

Can anybody tell me how to get past this hurdle:

[07:21:43] [Netty Server IO #8/INFO] [FML]: Client protocol version 2
[07:21:43] [Netty Server IO #8/INFO] [FML]: Client attempting to join with 11 mods : [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected]
[07:21:43] [Netty Server IO #8/INFO] [FML]: Attempting connection with missing mods [Sponge, cfm, ckm] at CLIENT
[07:21:43] [Netty Server IO #8/INFO] [FML]: Rejecting connection CLIENT: [FMLMod:cfm{3.5.2}, FMLMod:ckm{1.0}]


If you read the last 2 lines you will see that the server has Sponge and 2 client-required mods (1 is crayfish’s furniture mod) that the client doesn’t have

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The client needs cfm 3.5.2 and ckm 1.0 to connect to the server