Weird crash reportss

[RuneyIC]

Okay, so I made my own modpack and my own server files. The problem now is, that if i run any of them then i get a game crash saying that item ID 768 already exists (a lamp from redpower). So I made an block ID dump, and when i checked ID 768 was empty so I don't know what I did wrong. The only way to run my server is by deleting the redpower config file every time I want to start the server, so that's pretty annoying. The same thing happens when I try to launch my modpack on technic, so even on single player, i have to go in my .technic file and delete the redpower config file. Any help would be appreciated.