09-15-2010 05:09 PM
Hi zildjian78 and welcome to the Cisco Home Community.
You can download the drivers for your WMP54G here.
09-15-2010 06:49 PM
Hi zildjian78. My bad for not telling you that the first link is for the European Region of your adapter. If it is indeed EU version, go ahead and download the driver from the first link.
Otherwise head on to this link for the US Region drivers.
To clarify your last inquiry Ver. 4.1 is the hardware revision of your device and 3.01 is the Software revision of the driver. Both can be different number wise so fret not.
09-18-2010 01:41 PM
What version of Windows XP OS is installed on your computer?
What you can try is, Unplug the adapter from your computer and replug it back and then try to install the drivers on your computer again.