Cephy

Hello!!! I want to ask around if anyone else is having my problem with the Toolbox. When I leave the atmosphere, if I try and grab the toolbox while in EVA, immediately after it puts it on the Kerbalnaut's back the spaceship either dissappears or seems to violently disassemble into pieces and also kills any other crew member (by excessive G-forces). It's as if some kind of massive acceleration is put on the craft. Any idea how can I fix this? Thanks you!!!