My doors would not unlock. Is this a problem with the remote?

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I have a 2003 turbo beetle. I use my remote for the doors. Yesterday morning the passenger door would not unlock with the remote. In the afternoon neither the passenger door nor the driver door would open, I was in a hurry to go to the doctor The hatch did open so I lifted my 4 year old niece through the hatch to open the door. Is this a problem with the remote's battery, remote, or something else? Less then a month ago my car turned off immediately after I turned it on car. The solution to that the dealership said was to reboot the computer.