We've had lots of reports of people not knowing how to pair their SB2 smokin buds 2 headphones. Just try following these instructions:
For those of you having issues connecting
step 1. Make sure your SB2's are turned OFF.
Step 2. Make sure you are actually in PAIRING MODE Do this by holding the skull button on the left earbud til the indicator light on the back of the headset TURNS RED and IMMEDIATELY let go of the button
Step 3. On your device press the scan button and they should show up as SB2
Step 4. If they still will not connect plug in both your headset and phone and attempt to pair again
Thanks to a post by EarbudGuy : http://www.bluetoothdoctor.com/question?i-cant-pair-connect-my-skullcandy-smokin-buds-2-wireless-to-any-device-that-was-previously-working