Usb flash attaching problem -- umass module error

[aram baghomian]

Hi

I can't attache any usb flash drive or hard disk to my FreeBSD 8.2 box.
I didn't have any problem with this flash drive in linux or windows.
 
I get these messages when attached it.

ugent0.2: <SD MMC> at usbbus0
umass0:<SD MMC> on usbbus0
umass0:SCSI over Bulk-Only: quirks = 0x4101
umass0:1:0:0:-1: attached to scbus1
(probe0:umass-sim:0:0:0:0): autosense failed.
da0 at umass-sim0 bus 0 scbus1 target 0 lun 0
da0 :<SD MMC>  Removable Direct Access SCSI-2 device
da0: 1.000MB/s transfers
da0: 3830MB (7843840 512 byte sectors: 255H 63S/T 488C)
(da0:umass-sim:0:0:0:0):AutoSense failed
(da0:umass-sim:0:0:0:0):AutoSense failed
(da0:umass-sim:0:0:0:0):AutoSense failed
(da0:umass-sim:0:0:0:0):AutoSense failed
(da0:umass-sim:0:0:0:0):AutoSense failed
(da0:umass-sim:0:0:0:0):AutoSense failed
(da0:umass-sim:0:0:0:0):AutoSense failed
(da0:umass-sim:0:0:0:0):AutoSense failed
(da0:umass-sim:0:0:0:0):AutoSense failed
(da0:umass-sim:0:0:0:0):AutoSense failed
(da0:umass-sim:0:0:0:0):AutoSense failed
(da0:umass-sim:0:0:0:0):AutoSense failed
(da0:umass-sim:0:0:0:0):AutoSense failed

I suppose this error is from umass subsystem module.
I use some other freebsd's family product such as m0n0wall and in that boxes i get the same
error when i attached usb falashes.

plz help me.
thanks.