midi parameters jumping erratically ( Newbie SORRY)

hi all
trying build midi controller have ten push buttons , couple of pots. interfacing ableton.
just started pot on own. i'm using midi usb converter cable. have 220 resitor in series pin of midi plugand have checked pin config.
i put ableton midi map mode, turn pot , seems pick ok. take out of map mode , pot looks controlling parameter apart fact thats jumping crazy irratically different values. these values coming from?

help please.
the code copyed below.


int val = 0;
int val2 = 0;

void setup()
{
   serial.begin(31250);       // default speed of midi serial port
}

void loop()
{
   val = analogread(1)/8;      // divide 8 range of 0-127 midi
   midi_tx(176,1,val);         // 176 = cc command, 1 = control, val = value read potentionmeter
   delay(10);

   val2 = analogread(0)/8;     // control point 2
   midi_tx(176,2,val2);
   delay(10);

}

void midi_tx(unsigned char message, unsigned char control, unsigned char value) //pass values out through standard midi command
{
   serial.print(message);
   serial.print(control);
   serial.print(value);

i think you'd better using serial.write() rather serial.print().

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