I have a Sandisk Cruzer Titanium 4GB U3 usb-key, but after I insert it on my Win 7 machine, I see the following message:

However, I can still access all my files on it (at most of the times that I insert it, sometimes I can't). On XP machines it works fine. I have also tried formatting, as it keeps asking, but it asks again and again even after I had foramtted it. What the..?

However, I can still access all my files on it (at most of the times that I insert it, sometimes I can't). On XP machines it works fine. I have also tried formatting, as it keeps asking, but it asks again and again even after I had foramtted it. What the..?
My Computer
- Computer Manufacturer/Model Number
- PTG www.ptg.lt
- OS
- Win 7 Ultimate x64
- CPU
- AMD Phenom II X4 945 3000MHz
- Motherboard
- MSI 770-C45
- Memory
- Kingston 6GB DDR3
- Graphics Card(s)
- Sapphire Radeon HD4890 1GB GDDR5
- Sound Card
- Realtek
- Monitor(s) Displays
- Samsung 2243SN 21,5"
- Screen Resolution
- 1920x1080
- Hard Drives
- WD Green 1TB 3GB/s
- PSU
- Gigabyte 550W Superb
- Cooling
- 2x Nexus 80mm
- Keyboard
- Logitech Illuminated
- Mouse
- MS Wireless 2000
- Internet Speed
- 100Mb/s DL & UL