I have installed thunar-volman. I can see the devices when I plugin my USB disk, but I can not mount it by double clicking the icon. It seems that I don't have the permission to do is, as I can mount it if I use _sudo thunar_ to open thunar. How should I solve the problem? I use xfce4 and Linux debian 2.6.26-1-686 #1 SMP Wed Nov 26 19:14:11 UTC 2008 i686 GNU/Linux. Thanks. Ronggui