Still having the fireworks crash on my multiplayer server

I recently downloaded the latest version of TooManyItems mods for 1.4.7 and went onto my own multiplayer server which is on creative. Opened the mod, and used a few things from it, then tried out the fireworks, the fireworks didn't appear and I was instantly disconnected, tried to reconnect, the attachment is now all I see. Tried out the mod and fireworks on singleplayer, creative and survival and it worked fine. No issues.
I don't particularly want to lose this server as I've built a lot of complicated buildings.
I hope you can help with this issue as soon as possible

Digi