how to crash a server/dupe

i play a game called Xenimus (xenimus.com) and was wondering if anyone knew how i can maybe crash one of the games servers so i can dupe? Also what kinds of ways can you usually dupe in a game ? im kinda new to this... thanks

I don't think you need to crash the server just to duplicate an item....

duplicating an item crashes his client, so he wants to crash the server so the server doesn't crash his client...

how can i do it without crashing?