Different actions in USB automount

[Kiwon Um]

Hi everyone.
I've faced to a mysterious situation.

I have 2 USB devices, (1)SKY-DRV STICK and (2)AXIS HMDS-02GC.
When I plugged it into the USB slot, first one(1) is OK.
It's automatically mounted well executing a nautilus also.

The second one(2), however, has some problems.
It only works with a manual mount i.e. mount -t auto /dev/sdb1 /mnt.

The messages from dmesg are as follows:

usb 7-5.1: new high speed USB device using ehci_hcd and address 9
usb 7-5.1: configuration #1 chosen from 1 choice
scsi13 : SCSI emulation for USB Mass Storage devices
usb-storage: device found at 9
usb-storage: waiting for device to settle before scanning
usb-storage: device scan complete
scsi 13:0:0:0: Direct-Access SKY-DRV STICK 1100 PQ: 0 ANSI: 0 CCS
sd 13:0:0:0: [sdc] 8125440 512-byte hardware sectors (4160 MB)
sd 13:0:0:0: [sdc] Write Protect is off
sd 13:0:0:0: [sdc] Mode Sense: 43 00 00 00
sd 13:0:0:0: [sdc] Assuming drive cache: write through
sd 13:0:0:0: [sdc] 8125440 512-byte hardware sectors (4160 MB)
sd 13:0:0:0: [sdc] Write Protect is off
sd 13:0:0:0: [sdc] Mode Sense: 43 00 00 00
sd 13:0:0:0: [sdc] Assuming drive cache: write through
sdc: sdc1
sd 13:0:0:0: [sdc] Attached SCSI removable disk
sd 13:0:0:0: Attached scsi generic sg3 type 0
SELinux: initialized (dev sdc1, type vfat), uses genfs_contexts
usb 7-5.1: USB disconnect, address 9

usb 7-5.1: new high speed USB device using ehci_hcd and address 5
usb 7-5.1: configuration #1 chosen from 1 choice
scsi9 : SCSI emulation for USB Mass Storage devices
usb-storage: device found at 5
usb-storage: waiting for device to settle before scanning
usb-storage: device scan complete
scsi 9:0:0:0: Direct-Access AXIS HMDS-02GC 2.00 PQ: 0 ANSI: 2
ready
sd 9:0:0:0: [sdb] 4049152 512-byte hardware sectors (2073 MB)
sd 9:0:0:0: [sdb] Write Protect is off
sd 9:0:0:0: [sdb] Mode Sense: 03 00 00 00
sd 9:0:0:0: [sdb] Assuming drive cache: write through
sd 9:0:0:0: [sdb] 4049152 512-byte hardware sectors (2073 MB)
sd 9:0:0:0: [sdb] Write Protect is off
sd 9:0:0:0: [sdb] Mode Sense: 03 00 00 00
sd 9:0:0:0: [sdb] Assuming drive cache: write through
sdb: sdb1
sd 9:0:0:0: [sdb] Attached SCSI removable disk
sd 9:0:0:0: Attached scsi generic sg2 type 0
usb 7-5.1: USB disconnect, address 5

Actually I can set the auto.misc file for that, automount.
But I want auto-mount-with-nautilus.
Any Idea?
My system is kernel-i686-2.6.22.1-41.fc7.