Muhu Janus

SL stops responding and finally crashes when I try to upload a second file. It doesnt matter what file I try to upload. @ the moment I'm trying to upload models (mesh) ...I can upload the first one without any problems. When I try and upload the next file, the "open" box doesn't open and SL stops responding. I've totally uninstalled the viewer, removed the ap data and reinstalled. any clue to what may be happening?