My sony VGN N220E does not detect ext...

hi,
my laptop does not detect external devices,mostly mp3 players.
Recently i bought creative zen v mp3 player ,and after installing software cd ,when i connected the player to laptop ,it showed that the system can not detect any device software ,and asked to insert the cd which came along with the player ,i did ,,but no response .
Initially i thought there might be problem with the player ,or it might not support vista ,but when i tried the same in another vista program laptop (HP) it worked ,and i even tried with other mp3 players like sony ,sanasa etc .
And i would like to mention that there was no problem while installing software from cd ,and the time i would connect player ,it shows no device software located ,,and it wont detect my player .

please,can you provide me with a solution .

thank you