hey, help in need for my sonata
 

I just bought a 2002 sonata GL 4 cylinder car. But power lock of door doesn't work at all. The only thing I can do now is locking driver side front door with my key from outside and leaving the other three door unlocked. If I locked manually the other door from inside and then went out, next time when I open the door with key, the car alarming system beeps 3 times 30secs every time!!! It drove me crazy, keeps me worrying about my car's security when I parked it outdoor somewhere.
I checked fuse controlling power door locking, no burnt out at all.
btw: my remote keyless not working either, but I would try some reprograming first.
Any input? thank you very much.