Cannot mount my USB key

[oli013]

Hello,

I am unable to access to my USB key, I have the following popup:
Cannot mount volume.
Error org.freedesktop.DBus.Error.AccessDenied.

my Centos version is Centos 5.10:
# uname -a
Linux centos510 2.6.18-371.3.1.el5 #1 SMP Thu Dec 5 12:47:02 EST 2013 x86_64 x86_64 x86_64 GNU/Linux

Thank you in advance for your help.

[pravesh]

check ur dmesg or var/log/messages.

run fdisk -l if it shows usb.

USB disk has ntfs/vfat/fat filesystem on it?