BT device in Vaio VGN-S46GP

I am using a Vaio VGN-S46GP laptop pc that equipped with built-in BT device. On the
pc, I connect a BT mouse and works correctly. Sometimes, I would like to transfer a
jpg file to the pc from a BT phone without success. On the phone, I search the pc and the
pc shows connected. However the transfer fails. I use the phone to transfer the file to other pc or BT phones without any issue. Can someone advise the possible causes and fixes.

Thanks and regards,

Ray