USB BT device is not mounted at system startup

I have a BT device (a simple antenna transmitter&receiver) which is always connected to a USB port.
When the system is started, I cannot enable or disable the device through the BT widget in the system tray.
To solve this, I have to detach and reattach the device.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: gnome-bluetooth 3.2.2-0ubuntu5
ProcVersionSignature: Ubuntu 3.2.0-26.41-generic 3.2.19
Uname: Linux 3.2.0-26-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.0.1-0ubuntu8
Architecture: amd64
Date: Sun Jul 15 12:15:15 2012
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
SourcePackage: gnome-bluetooth
UpgradeStatus: No upgrade log present (probably fresh install)