Leviathon_hunter

I'm running a server on windows7, tekkit 2.1.1 and whenever i try to connect to the server using my own machine i get an error saying "Connection lost. Internal Exception :java.lang.nullPointerException" My friend can connect to the server fine, and it just randomly logged me off stating the error. In server logs it says "end of stream" Have tried reinstalling tekkit by deleting .techniclauncher Have also reinstalled java to see if it fixed it but to no success. Can post logs if needed. Edit- Have just loaded up the world in sp and all the pipes that were in the world are invisible, could this be the cause. Tried to remove as many as possible, but they were invisible. Edit2- okay i have narrowed it down to something in my inventory on the server(not pipes), swapped inventory files with another player on the server and can log on. Is there anyway to edit inventory files? Final Edit- okay, found the problem. An item with the id 166 will cause a disconnect from the server and no chance of getting back on untill the item is removed from the inventory. Is it possible to somehow blacklist this item, ie not even letting people pick it up as you get disconnected before the command to get the item is executed?