[Solved Problem] "GDBus.Error:org.openobex.Error.failed: Unable to request session" While Send File via Bluetooth in Ubuntu 13.04

In Ubuntu 13.04 have a problem while send file via Bluetooth to other devices. What the error description? The error description like image above is "GDBus.Error:org.openobex:Error.Failed: Unable to request session".

How to resolve that problem? Just simple, we need to install blueman.

Now how to install blueman? Follow these steps:

1. Run Terminal, 
2. Then type sudo su for access superuser. 
3. Then type this command:

   apt-get install blueman

4. Then restart your system.
5. And you try to sending file via bluetooth. I hope your bluetooth working well.