destruction cataclys bugs my game

[jackhiggins1388]

Title: destruction cataclys bugs my game

Version: 3.0.3/3.0.4

OS: i don't know what mine is , i gess it meens i use windows 7

Java Version: 7

Description of Problem:

well , i have a tekkit server and when my friend got a destruction cataclys and used it , he got disconected by server with the erro internal server error . so i thought it was hes game , but when i got one and used it i got the same problem

Error Messages:

internal server error

Error Log:

[Backplague]

Internal server errors always-ish write a crash log. Dig it out and post here.