SoftwareSerial Serial(0,1); //RX|TX
Don't name your SoftwareSerial instance with the same name as the hardware serial instance. Not sure if that's your problem, but it is bad enough to fix before going any further.
PS - Why are you running a software serial on the hardware serial pins? If you're going to use those pins, then you might as well just use Serial instead of slow and buggy software serial.