Saying not one battery is charging first think comes in mind is to check the charger status. If you own a multimeter check power cord function and output power of the charger.
If the charger is ok, having all of them not working is posibly a matter of batteries software update. Update it in assistant2.
Then check again and if the problem persists,
have in mind that a completely dead battery does not sending signal to the batttery's control board, so no responce is going to happen. But did you discharge them all so far? If you did it, i am affraid the only way to resurect them is to open them and connect a lipo charger straight on cells wiring. Do it only if they are out of guaranty time, and with major care. Before you do this, you must check the output power connecting a multimeter in connectors 2 or 3 or 4 for possitive and 7 or 8 or 9 for negative. If the current you see is under 2.8V to 0V is indeed a dead current battery and needs by pass charging. Also before open the battery try something else... some times it works...connect the charger and push the battery button for 30 seconds. Have also in mind that these smart batteries are not charging under hot conditions. Room temperature must be normal. Above 38 degrees they refuse charging. If the only led lighting is the third one, this is the case. If nothing works, and the batteries are under guaranty time send them to service.