500 GB external USB hard drive USB 2 configuration problems

Hello Sirs.
I recently adquired a 500 Gb external USB hard drive part number PX1269E-1G50.
I have some problems with the USB 2.0 configuration in windows XP. When i connect it to an usb 2.0 port i receive the message "High-speed USB hard disk drive plugged into a non-hi-speed usb hub", and the device stays in low USB (12 mbits/s) speed. (I checked the port with another usb 2.0 peripheral and the port is working in usb 2.0 mode correctly).
I checked the PXI1269E-1G50 in others pc and i have same results. I cant get it to work in USB 2.0 mode. I also have some problems with the virtual CD partition that is always present when you insert it and mount. Exist a way to remove it ?
I only use the hard disk for daily data back-up and i don't want to use any more drive letters in my system.
The main PC is an ASUS P4P800-E deluxe with windows XP SP2 fully updated and build in USB 2.0 intel controller.
Best regards
PAMF

Hello again everybody
OK. Finally i had to send the disk to my dealer. Toshiba in Spain says there is not solution. Sorry. This is an erratic product. Sometimes with one cofiguration simply works and sometimes with a different configuration does not connect in USB 2.0 mode. I don't want such a product in my desktop... and the Virtual CDrom is impossible to turn off. (I'm not interested in security tools. I only want to make daily backups)
Thanks to everybody in the forum for your help.
pamf
[Edited by: admin on 09-Jan-2007 20:51]

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