Can't send file to smartphone via bluetooth in Lubuntu?

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http://askubuntu.com – I'm a new Lubuntu user (never used any Linux OS before). File Manager --> Preferences --> Bluetooth Manager I can't seem to send a file to my smartphone. I click the bluetooth icon on the task bar, a window comes up showing my smartphone. Clicked "Pair" to pair my laptop and smartphone. Once paired, the Send File button is activated, meaning I can already send a file. So I choose a 36MB .mp4 file, then send, then: Request timeout Error occurred while sending file video.mp4 First I thought it was because I'm using a custom ROM on my smartphone. But I switched to Windows 7 and was able to (HowTos)