Experiencing Technical Difficulties With My Flash Drive, Help!

Hey, so I have a Corsair Flash Voyager GT (2 GB.) which I purchased a few months back (July). It has performed flawlessly until last week, when, at random times, the contents of the drive would seemingly "disappear" in windows explorer. Any file transfers to or from the drive would also simultaneously fail.

When I open "My Computer," (where the drive name and icon are still visible) and look at the properties of the drive, it shows that the drive size is 0.0 MBs, with 0.0 MBs of free space left.
This happens randomly, but usually when some kind of file transfer or something is happening, (It always happens when the Adobe File Downloader tries to get images from my drive.)

I recently tried fixing this by backing up all my data, and then formatting my drive and copying the files back. It didn't work.
Then I tried formatting it again, and then instead of copying my portable apps back on, I downloaded them all again. It worked for 2 days before it failing again.

Also, I had scanned it the previous week before the mishaps occurred, and had found a virus (W97M/Thus.A)in a word document. I erased that document with Eraser, which overwrote it 7 times. I then scanned my drive with Spybot S&D, McAfee Stinger, Avast! (free version), and Ad-Aware 2007. (all updated definitions) Nothing came up, so I assumed it was now clean.

I have since scanned it repeatedly on different systems with Norton Antivirus, and Trend Micro, and not found anything.

Does anyone know what is causing this problem, and how I can fix it?

All help is appreciated