Error when transferring a file via Bluetooth to a Samsung Galaxy phone

Had the same problem with SGS2, solved by going (on pc) into Bluetooth Preferences -> Receive Files and switching "Receive files into Download folder over bluetooth" back and forth

Well I did have this problem and I just figured this out. Make sure your computer has "Allow Bluetooth Devices To Find This Computer" selected. Then follow this:

Start -> search -> Bluetooth File Transfer

Click this then click "Receive Files". Now you are ready to receive files from any other devices!

I think it works brilliantly but I am using Windows 7. It might be different for Windows XP. But I am sorry, I don't know. Hope this helped!