Sandisk SDCZ4-128 won't appear

notebook: Acer Extensa 2000, Windows XP Professional SP2

Fresh installed Windows XP Professional, then SP2, then all the drivers from following site:

http://support.acer.com.au/supportac...penDocument&ML

I then installed ATI SMBus driver for WinXP from following site:

http://support.acer-euro.com/drivers...k/ex_2000.html

Sandisk Cruzer Micro will not detect for my client. It detects fine in other systems (I've only tried one which was Windows 2000 SP4). I tried other USB Flash Drives on the Acer, which also work fine. I also flashed the BIOS to v1.16. Absolutely stuck on ideas.