So my phone would never stay connected to kies, i could only sync around 1gb of music and it would drop. Here is my solution. I have a galaxy s2 on the bell canada network, it was running 2.3.3 I updated my firmware using odin, no root to 2.3.5. And suprise suprise, after updating, i was able to sync my 10gb of music with no disconnects, no driver errors. hopefully this info helps someone out there. Upgrading via odin is insanly easy, theres many guides around the forums.