USB stick will not recognize

hello, My PC (Win XP Home SP2 Medion NL) does not recognize a USB stick.
However the message that I should install a driver, the explorer sees no stick.
Manufacturer (Sharkoon Flexi-Drive 4 Gb) has no drivers because it Win XP must be compatible. Microsoft called it a recommended update (driver) to call for Median for the USB hub.
But this update does not work ... ... ..

Incidentally works other USB devices (webcam, card reader), but only with the supplied driver.
In the device manager I see a yellow question mark under "other devices", among USB controllers, the stick is not.
I've installed all the patches from Microsoft, including non-critical.

help!!!

Install chipset drivers again, USB2.0 under XP SP2 does not require drivers to exceed that chipset drivers to the USB ports to link to the south bridge, and the specific drivers for the USB devices themselves.

Try this out: in the "new hardware found" use your driver to choose the location and fill you in: C: \ WINDOWS \ INF

If the property is XP recognizes the device as external mass storage. What follows immediately "found new hardware", do the same again, that installing the external drive.

I've been this way a memory stick, mp3 player, camera and card reader installed. (The reader gave 5x "new hardware" for the device 1x and 4x for the separate card slots.)

It may be that if you stick then another USB port connect you again "new hardware" will install the same way again.

It works!
I have the above proposed chipset update does not run, more directly proposal you tried.
I do not know exactly why it works, but the important thing now is that I can use my stick.
Great thank you dear, I am very happy!