Dell Pocket DJ... Vista won´t recognise it

​ Hi ! ​

​ I have a Dell Pocket DJ fully upgraded, with plays for sure firmware, but since I installed vista, my PC can´t recognise it. Actually it recognise but i can´t transfer any music or explore it. Every time i try to explore the device when it appears on my computer (folder), the window freezes. I tried to transfer on my girl PC, she has win XP, and worked perfectly. Could anybody plz help me ?! Thanks already. ​