Problem: Bluetooth in OS X Lion

I have a problem.
Yesterday, I downloaded and installed OS X Lion in my Macbook Pro (2009). Everything is OK, except Bluetooth. I don't know the reason, but my computer doesn't recognize Bluetooth integrated in my Macbook Pro. What can i do?
Thanks in advance.

I've done:
- Reset SMC.
- Repair Disk Permissions.
- Reset PRAM with keys (Cmd+Alt+P+R) doesn't work. I don't know the reason.
But the problem remains. I've watched the section "System Information" in About my Mac, and the section "Bluetooth" is "not available", but my computer has bluetooth, in Snow Leopard was worked perfectly. It's really weird.
So please... Someone can I help me with this problem?
Thank you.
(Sorry for my bad english level. I tried to explain my problem as best as possible).

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BSD: not present
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Logical sector size: 512 bytes
Disk identifier (GUID): 0000303E-4D40-0000-1B4C-0000F9090000
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Number Start (sector)    End (sector) Size       Code Name
   1              40          409639   200.0 MiB   EF00 EFI system partition
   2          409640        73900919   35.0 GiB    0700 Customer (name is wrong)
   3        73900920        75170455   619.9 MiB   0700 Recovery HD
   4        75170456       390588423   150.4 GiB   0700 stuff
   5       390590464       976773119   279.5 GiB   0700 Basic data partition (name is wrong)
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