Regarding my motorola Rokr S9,,,,,,my light is flashing blue/red while charging...what is the problem? it has not worked properly in quite some time.

Mine is too. Mine will sit solid red for a little then turn solid blue. Then after that it will flash red all the time. I've had it on the charger for the last 2 days and that's all its been doing. I read the flashing red light means the battery is either unchangeable or not making proper contact.

Press and hold the power key (under the red cover) longer than the time required to turn it on, until its indicator light is alternately flashing in red and blue. It is in pairing mode (discoverable) now. Then, make your phone (or computer)'s bluetooth application search for new devices. After a little while, the S9 should appear on-screen. Select it and make it connect. If a pairing code (or PIN, or passkey) is requested, enter '0000' (four zeros). If the pairing process is successful, the S9 should enter the stand-by mode. There could be such an indicaton in your phone (or computer) too.
Hope it works for you.
By the way, if your headset's user guide happens to be missing, feel free to download it from this location.
Anyway, please, let me know if I can help you any further.
Regards, Carlos

Press and hold the power key (under the red cover) longer than the time required to turn it on, until its indicator light is alternately flashing in red and blue. It is in pairing mode (discoverable) now. Then, make your phone's bluetooth application search for new devices. After a little while, the S9 should appear on-screen. Select it and make it connect. If a pairing code (or PIN, or passkey) is requested, enter '0000' (four zeros). If the pairing process is successful, the S9 should enter the stand-by mode. There could be such an indicaton in your phone too.

Hope it works for you.

By the way, if your headset's user guide happens to be missing, feel free to download it from this location.

Anyway, please, let me know if I can help you any further.

Regards, Carlos

Starting with your headset turned off, press and hold the power button for some 6 seconds, until the indicator light flashes alternately in blue and red. It is in pairing mode now. Then, make your phone's bluetooth application search for new devices. After a while the S9 should appear on-screen. Make it connect. If a paring code (or PIN, or passkey) is requested, enter '0000' (four zeros). The indicator light will flash some times and enter stand-by mode.
Hope it works for you.
Regards, Carlos

when the red light is on while charging it means it is at less than 25% charge let it charge until the light is green
then tryy connecting it to the computer

Try to press the power boton in the same time you plug the charger, after this action mine is working and charging perfectly, maybe this is the "reset" solution... Hope this helps you.

This might work if you aren't using the ORIGINAL charger. I had this problem when my cat chewed through the original Motorola charger. I figured my Blackberry charger would work fine, but it didn't. I then discovered that my Blackberry charger was 700mAH and the broken charger was only 550mAH. When I found another charger with the proper power it charged. I also found that it worked when plugging it into my computer with a standard mini USB. I hope this helps.

From Falvey86: Hold the headset start button for about 10 to 20 seconds, the lights will start flashing red and blue, then the search for Bluetooth devices from phone and it will appear as: S9. press "connect", a window will appear, place the password "0000", that should do the trick!!!!

I had the same problem with a Samsung phone. There are two ways of fixing this; First, you can remove the S9 profile from your phone's bluetooth list, and then add it again, going through pairing and entering 0000 on your phone when asked for the code.
Alternatively, you might try pressing the "play" button on the right earpiece on the Motorola S9. This is supposed to kick it into the A2DP stereo mode for music listening.
Good luck.
And get a copy of the manual from the Motorola web site at http://direct.motorola.com/ens/s9/Headset_Home.asp I found this very handy for checking what the little flashing lights mean. When you get stereo reception, the little LED in the middle of the headset flashes green, not the usual blue and red and purple for voice calls. 
In case you didn't know, as a phone headset, with the microphone activated, you only get sound in your left ear, and the light flashes blue. For music, you get both ears, and it flashes green. So if it ain't green, you are in mono mode.

OK I managed to get my head set to work. Make sure the unit is charged, press and hold both the 'ON' button (on neck piece) and the "PLAY/PAUSE' button on the right earpiece. Keep holding then the LED should flash Blue three times THEN flash alternate RED and BLUE. You should then be able to Pair the Device. Good luck