SKS Fob stopped being recognized

-sks fob stopped working
-fob red light in corner works
-buttons aren't stuck
-started the car with fob in pocket and doors unlocked
-ran inside the house to get my coffee mug car didn't beep (out of range) usually beeps
-drove to work shut off car now car doesn't recognize fob unless in dash
-wont lock or unlock from remote only metal key
-messed with button under steering wheel (its pushed out)

Im new to 04 prius and had mine for a month almost, so far so good. I have only one sks fob and red light on remote lights up when I press any of the 3 buttons, buttons don't stick, checked the button under neat steering wheel and its pushed out. Cant lock the car from any of the buttons outside nor unlock by touching handle or pressing buttons on remote. Unlocks only with metal key and can only start it with Fob being insert into dash, this all just happened this morning. worked fine before.
I usually unlock the car by touching the handle, today I unlocked the car as usual, started the car with key fob in my pocket, forgot my coffee mug in house, ran out the car to get it, didn't hear the usual beep from car that key isn't in range, drove to work, on way out the car door shocked me, tried locking the car with pressing driver side button, didn't work, tried remote didn't work, jumper back into car it wouldn't start unless I put fob into dash, shut off the car pulled the fob out from dash tried starting the car with fob out yellow dash key came on as it wasn't present, tried messing with button under neat steering wheel, it was pushed out and I clicked it couple times, still would only start with fob inside dash. Got out the car, closing door it shocked me again and tried locking from black square button on door handle or remote doesn't work, only locks and unlocks with metal key. Please help

 

thanks guys for quick response, just came back from a walk with co-workers and venting to them as I was coming close to the building I pulled clicked the remote unlock button from about 25-30 feet and car unlocked, hit the lock button and it locked, I came close to it, grabbed front pass door handle and it unlocked and I opened the door and closed the car with hitting outside black square on door handle.

 

I will be looking into changing the key fob battery just to know its new when my key fob shell arrives from ebay sense mine is beat up and worn out, does the fob has to be reprogramed after battery install?

 

So after 3 days of messing with small key today i got a new battery for the remote, doors unlocked right away and locked from remote, but leaving work SKS didnt work again, the little red light flashes on remote but won't unlock or lock nor SKS work, had to do use the small metal key and put the fob into ignition for it to start and drive.

 

12v battery was low that it wouldn't start the car, this was a month ago, took it out and charged it up and car started up right away been driving for a month with no issues with car battery. And haven't received my new shell, didn't look where i ordered from while checking out on ebay and its coming from china.

Doors or hatch doesn't externally tried the handles and hatch no go

 

will check the battery tonight, if low voltage will throw it on charger overnight.

 

battery is at 14.5v, car been standing without use for 4 hours

 

14.5v was using cheap electric harbor freight volt meter.
Got a used sks key fob from ebay, registered it, car starts with it, tried registering sks mode, when got to the point when you hold the lock and unlock on old remote for some times and doors would lock and unlock, nothing happened then i grabbed new remote and held lock and unlock at same time, doors locked and unlocked, pressed the lock on new remote and it worked to exit registration mode i just openned the door. Tried the new remote sks mode, doesnt work, tried hitting lock and unlock doors didnt do anything. Will try to re-register the remote again. Would unhooking the battery from car for sometime reset anything?

 

I did the chicken dance with used SKS remote, while adding sks option from priuschat write up, it will unlock and lock the doors but when i open the door or insert the fob to exit out from registering remote doesn't unlock nor lock doors anymore.
-both remotes still dont unlock nor lock the vehicle only start (my original and one i got off ebay)
-checked the voltage on battery unhooked from the car it was at 13.0v with HF volt meter.