Annoying crash problem

[General Cameron]

Recently I have had this problem for whenever I try to connect to a server. Every time I try... IT CRASHES! I recently got the RTB mod and it doesn't crash in Single Player. It's a pain in the ASS! I want to build a lab in Multiplayer because I can't host. It always gets to loading objects before going down the hole.

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[General Cameron]

Will someone please help me? It always crashes at Loading Datablocks. About half way through.

[General Cameron]

I've looked on the support, and used the search bar, and nothing comes up. Please help! I just want to play blockland!