Evan Turner

I need help when i play on single player in Tekkit Classic i have terrible lag, such as when i punch something it gets hurts like 5 minutes later or when i mine a block it appears in my inventory 5 minutes later ect.... The lag happens on only servers not single player and I've also tried playing on my server and my friends server but none of them seem to work.(Me and my friend use hamachi to host our servers)