problema mouse usb

[roberto <roberto03@gmail.com>]

hello,
when i plug-in my usb cable for the mouse i get the following messages
in /var/log/messages:
###############################################
Sep 29 05:33:38 me kernel: usb 1-1: new low speed USB device
using address 3
Sep 29 05:33:39 me usb.agent[6107]:      usbhid: already loaded
Sep 29 05:33:39 me input.agent[6150]:      evdev: already loaded
Sep 29 05:33:39 me input.agent[6145]:      evdev: already loaded
Sep 29 05:33:39 me kernel: input: USB HID v1.10 Mouse [Logitech
Optical USB Mouse] on usb-0000:00:1d.0-1
Sep 29 05:33:39 me input.agent[6205]:      evdev: already loaded
Sep 29 05:33:39 me input.agent[6205]:      joydev: already loaded
Sep 29 05:33:39 me input.agent[6205]:      mousedev: already loaded
Sep 29 05:33:39 me input.agent[6205]:      tsdev: already loaded
Sep 29 05:33:39 me input.agent[6147]:      evdev: already loaded
Sep 29 05:33:45 me kernel: agpgart: Found an AGP 2.0 compliant
device at 0000:00:00.0.
Sep 29 05:33:45 me kernel: agpgart: Putting AGP V2 device at
0000:00:00.0 into 1x mode
Sep 29 05:33:45 me kernel: agpgart: Putting AGP V2 device at
0000:01:00.0 into 1x mode
Sep 29 05:33:45 me kernel: [drm] Loading R200 Microcode
Sep 29 05:33:55 me kernel: agpgart: Found an AGP 2.0 compliant
device at 0000:00:00.0.
Sep 29 05:33:55 me kernel: agpgart: Putting AGP V2 device at
0000:00:00.0 into 1x mode
Sep 29 05:33:55 me kernel: agpgart: Putting AGP V2 device at
0000:01:00.0 into 1x mode
Sep 29 05:33:55 me kernel: [drm] Loading R200 Microcode
###############################################

and mouse works properly except fot the fact that i can not scroll up
and down pages by the central wheel, which in turns works correctly
when i use it to make copy and paste between files
any ideas?

thank you
--
roberto
GNU/Linux, debian sarge
kernel 2.6.8