can't find file

I have one of the first iPods, (IPod bricks I like to call them) and when I plug it into my laptop it charges and itunes can find it but the file from the device can not be found. the ipod do not disconnect appear for a second and then flashes a couple times and disappears which is enough time to find the file and its gone again. i tryed all the ipod cords in the house and am stumped.