Hey
You are getting kicked becuse you are moding NW on witch servers are running and servers have autto-hack-kicking.
So when there is examp. in module_items lets take sword if sword originaly has 40 trust damage and you change it to 50 server will recognize that it isnt 40 in your module and you will get kicked.
You should only touch textures and models!
Dont mess with module etc..
and coding if you just want to make game look better.
If you want new mod then create new module in your game folder.