Bought today..does battery have to be charged for 3 hours before use? please advise

Sure the charger is good? Battery bad and not taking charge? Unit itself bad?

If bought today take it back and exchange it at store and make sure that the replacement works.

That depends on which red light is flashing. If the battery light is flashing, that means the battery is exhausted. Fix it by charging the battery.
If the status light is flashing red, that means the paper is jammed. Fix this by opening the paper door and pulling out the media. Full instructions are on page 3 of the manual.
The battery light is the one marked with a battery. The status light is the one marked with an exclamation point inside a triangle.

The way to solve the problem is as follows:
1. Goto the My Stuff Icon and select the "My images" Icon.
2. Select a Photo to open it.
3. Click the drop the drop down menu (▤), and click rename.
4. Type in a name then .jpg and save.
5. Then "send" it to bluetooth.
Voila! Good luck everyone.

If you are printing from a PC/Mac via Bluetooth, It won't accept anything other than Jpg's and also if the file name is too long (or if the file has multiple .'s in the name as I just found out)

take the battery out of the pogo for a couple of minutes put it back in make sure its charged we and then reboot you phone, if that does not work then u have a bad cable or a software conflict. good luck

Bad news. The laser diode responsible for printing black has up and died. You need a new Laser Unit, part number LR1461001. Brother has released a "Service Update" about this one; the instructions for replacing the laser unit run to nine pages. If you're within the 1-year warranty, it won't cost you, but it won't be printing with it today.

Install the battery (see above steps).
Connect the AC adapter to the printer and the power source.
Notes:
Before using the printer on battery power, fully charge the battery for
2.5 hours.
You can print photos while plugged into the power source.

i tried changing my battery and it worked..if not you can always have it reprogrammed

well, i just chcked my camera, and you have the right type....it could be the battery is just bad, though i don't know how to check this without trying it in another camera.