Ipwn370

This happenend me as well, but i was trying to get some diamonds out of a energy condenscer. I kept trying to log back into my world the world would load up i could see my hotbar, the minimap and the text that tells you about he creation quest, and villages and etc. i tried what barnaby suggested, but when i logged back in all my mods where gone. so i went back and renamed the folder to mods, but when i logged back in none of my technic stuff was there :/ how can i fix this?