Hi, if I plug the first usb device to my router it gets mounted to

root@AsusP:~# mount | grep sd
/dev/sda1 on /mnt/usbdrive type ext2 (rw)
root@AsusP:~# df -h | grep sd
/dev/sda1               958.5M    861.9M     47.8M  95% /mnt/usbdrive

if I plug another usb device to my router it gets mounted to the same mount point. Than I can't use my first usb device anymore.

root@AsusP:~# mount | grep sd
/dev/sda1 on /mnt/usbdrive type ext2 (rw)
/dev/sdb1 on /mnt/usbdrive type ext2 (rw)
root@AsusP:~# df -h | grep sd
/dev/sda1                18.6G      9.8G      7.9G  55% /mnt/usbdrive
/dev/sdb1                18.6G      9.8G      7.9G  55% /mnt/usbdrive

After umount the second USB device everything is normal and I can use my first USB device again. What script do I have to change so that automount is working properly for more than one USB device and how exactly do I do that? I'm using Kamikaze trunk 10443  with 2.6 Kernel. Thanks for helping.