For some people who might know, bluetooth connecting with the NXT can be very tricky. So here are the steps you should take to connect. I'm using a XP with the Kesington bluetooth dongle. This should be able to work with other dongles without to much change to my steps.
Steps:
1. Connect your bluetooth dongle before you turn on your computer. This avoids any hot plugging problems.
2. Make sure you installed your bluetooth driver. Check by going to: Start> Right Click My Computer> Click properties> Go to the Hardware Tab> Click on the Device Manager and make sure you see a bluetooth section.
3. Click on the little bluetooth icon you could find at the bottom toolbar.
4. Click on add bluetooth device. It should show a setup wizard.
5. The setup wizard should guide you through the process.
6. If your setup wizard permits, I would selecting pair now during the setup. If you have selected that use the default passkey, it will make everything easier. Just click the orange button once your NXT prompts for the passkey.
Alternative Way:
1. Open NXT-G and make a new program
2. Open the brick window and click scan.
3. Wait as this could take a while.
4. Once your NXT is found highlight it by clicking it and then hit the connect button
5. Click the orange button immediately after it prompts for the passkey.
6. Click on the Accept on NXT-G
7. If your bluetooth software prompts a message for confirming the connection select accept.
If you have tried connecting before you should follow these steps:
1. Plug in the Bluetooth device.
2. Install manafacture software that comes bundled with it (if it is not installed)
3. Execute the program that came with the Bluetooth device.
4. Delete the any of the connection you see that has to do with the NXT
5. Click on add new device or search for new devices
6. Find your NXT brick
7. Click next or select
8. Click pair now or connect now or next if your program dosen't have the option to connect to the NXT during the setup of a new device
9. Click finish or finish up the wizard.
10. If you did not connect on the connection try connecting. The NXT should pormpt a passkey before the computer.
11. Press the orange button to accept.
12. Disconnect from the NXT (either by turning it off or disconnect the connection with the program)
13. Scan for NXT devices in NXT-G
14. Click connect.
15. It should be connected!
Alternative Way:
See Kurt's post on NXTasy.org's forum here. It does a more thorough job and uses some modifications to help make sure your PC get connected to your NXT.
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