What doesn't work, the Sony or the editing software?
Most digital recorder will appear in Windows XP as exertnal storage device, as long as XP has the necessary drivers to recognise the device. If XP does recognise the device as a storage device, you can simply copy the recordings onto your computer and if they are in a supported format you can edit them in Audacity. If they are net in a supported format, you would need a suitable decoder to change them into a supported format.
Supported formats are WAV, MP3, AIFF, FLAC and OGG.
If your recorder is not recognised by Windows you will need to contact Sony or the dealer that you bought it from.