Gumiho

I am playing with the Tekkit classic, in Single Player mode. Whenever I log in to my world however it loads me up like i'm buried alive and it kills me no matter what i try to stop it. Then when i re-spawn it tells me that my home bed is missing and when I go back to my point that i made for my home everything I've built is gone! So my inventory is wiped out and everything I've worked on is as well!! I've tried uninstalling and re-installing everything but it did it again! Please help!!