Ubuntu :: Ubuntu 9.10 + NTFS-Config And Files Missing From NTFS Partition?

First off let me say that I love working with Ubuntu. It's a great OS to learn Linux on. Now on to my problem. I have a laptop that dual boots. Ubuntu 9.10 x64 and Windows 7 Ultimate x64. Been working just fine. I was using NTFS-Config to auto mount the Win7 partition during startup of Ubuntu. It has been running fine. I am able to move files between the linux partition and the NTFS partition with no problem. Now I've come across a problem. I big problem. Just this week I installed VirtualBox onto Ubuntu. I started creating virtual machines. 6 in all (3 Win 2k3, 1 2k8 and 1 Win7). I was saving the virtual machines to the NTFS drive as this was by far my largest drive. I used a directory titled "virtualbox" under the c:/users/public directory. This setup was working great. Was able to get my vm's patched and up to date. Created several snapshots. Basically I was a happy camper.

Last night I booted into Windows 7. OS started fine. I was just surfing the web. After that I rebooted the system and entered Ubuntu and started Virtualbox. I tried to start a vm and it complained that the virtual harddrive was missing. I checked to make sure that the path was correct for the virtual drive and discovered that the entire virtualbox directory that I created on the NTFS partion was gone!!! Everything else was in place and intact including music and large video files that I had downloaded to the Ubuntu partion and moved the the NTFS partion.

I save these virtual machines???? Should I abandon using NTFS-Config. This is somewhat critical since I had took sometime to create this test lab and to have it disappear from simply booting into Windows 7 is crazy.