ALso, FWIW, I urge you to move on from VBox to VMware. On my Win 7 Machine, on boot, it made connecting to the Internet a 30-45 second process, during which many of my logon processes would wait. It made my whole boot process much. much slower than it needed to be. I triple verified that this was caused by VBox and VBox only.
I then moved on to VMware and my boot process shaved nearly a minute off.
But, trying to run a 64bit OS as a guest to a 32bit OS as host is, as SD said, unbearably slow.