Hi I like your mod, so I want to add it to server.

To test the mod, i am changing myself on server to creative mode.
see the mod, but the items arent visible, search for the items, items are visible and can select

I select item and put ich down into belt. Server disconnects me. :(

Sounds like an installation issue on your end. Make sure the mod is properly installed on both server and client and post logs from both server and client if it's still not working.