Using USB Flash drive with Windows XP

Hi,

I have a ZION 256MB USB Flash drive. I have been using this fine with my Windows XP PRO on my office computer. Please note that I have limited system rights. I was using it well. Now, all of a sudden my computer recognizes the device and loads it in the system tray, but I do not see a “Removable Drive” icon. Also, note that I have C, E and F as hard drive and D as CD-ROM. Also, I have H and S as my mapped drives on a server. Can anyone help me with a resolution?

Points appreciated.

Thanks,
Subramanyam