USB stick not seen

My Friends: I have a Compaq Evo Pentium 4 desktop running Win XP Pro SP2. I plugged a 4.0 GB USB memory stick (USB 2.0) but the stick does not show up in My Computer, Device Manager or Disk Management. The stick works on my Pentium 3. The specs for this computer shows the USB supports a 1.1 USB. Is this why it is not reading my stick? How can I fix this? Thanks or any help.

It should show up even though it is 1.1 USB ports you should get a message from WindowsXP
to pulg it into a 2.0 USB port for the best performance but still it shoud work. You may have a
bad USB port(s) on the Compaq.