usb 2 stick problem

[Alfred Gerster]

Hello all
how can I run my usb stick running with full usb 2
speed?
if i remove the ehci module the usb 2 stick is mounted, but only with
the slower usb 1 speed.
dmseg says:

ehci_hcd 0000:00:02.2: remove, state 1
usb usb3: USB disconnect, address 1
ohci_hcd 0000:00:02.0: wakeup
ehci_hcd 0000:00:02.2: USB bus 3 deregistered
usb 1-2: new full speed USB device using address 2
Initializing USB Mass Storage driver...
scsi0 : SCSI emulation for USB Mass Storage devices
  Vendor: SanDisk   Model: Cruzer Mini       Rev: 0.1
  Type:   Direct-Access                      ANSI SCSI revision: 02
USB Mass Storage device found at 2
usbcore: registered new driver usb-storage
USB Mass Storage support registered.
SCSI device sda: 2001888 512-byte hdwr sectors (1025 MB)
sda: Write Protect is off
sda: Mode Sense: 03 00 00 00
sda: assuming drive cache: write through
 /dev/scsi/host0/bus0/target0/lun0: p1
Attached scsi removable disk sda at scsi0, channel 0, id 0, lun 0

with ehci module running, usb 2 stick is not mounted, but the slower usb
1 sticks running still fine.

the error message with usb 2 stick on 
dmseg says: 

Attached scsi removable disk sda at scsi1, channel 0, id 0, lun 0
USB Mass Storage device found at 3
usb 1-2: USB disconnect, address 3
usb 3-2: new high speed USB device using address 5
usb 3-2: device not accepting address 5, error -71
usb 3-2: new high speed USB device using address 6
usb 3-2: device not accepting address 6, error -71

sure someone out there now's what i am not aware off.

thanks
Alfred