Force plate calibration matrix

I am a student majoring in biomechanics. I collected data from a force plate with the use of the data acquisition toobox. I collected volatage values ranging from -10 to +10 from a force plate.

However, I cannot collect force data even if I apply the calibration matrix to the voltage signals. In other words, the force values should be more 700. But, the values are still less than 10.

The code I have created is as following.

AI=analoginput('dtol',0);

set(AI,'InputType','SingleEnded');

chan=addchannel(AI,1:6);

set(chan,'InputRange',[-10 10]);

duration=10;

set(AI,'SampleRate',250);

set(AI,'SamplesPerTrigger',2500);

set(AI,'TriggerChannel',chan(3));

set(AI,'TriggerType','Immediate');

start(AI)

while(~AI.Logging)
 disp('Waiting for trigger');
 pause(1);
end
disp('Triggered);

wait(AI,duration*2);

data=getdata(AI);

%ca=calibration matrix provided by AMTI

ca=[2.937 -0.015 0.036 -0.023 0.025 -0.005;0.007 2.923 -0.037 0.040 -0.021 0.020;0.006 0.006 11.469 -0.028 -0.002 -0.011;-0.001 0 0 1.528 -0.002 0.003;0 0.003 0 -0.002 1.528 -0.005;0.008 0 -0.004 0.005 -0.001 0.738];

%k=correction coefficient

k=[0.12207 0.12207 0.12207 0.12207 0.12207 0.12207;-0.12207 -0.12207 -0.12207 -0.12207 -0.12207 -0.12207;0.12207 0.12207 0.12207 0.12207 0.12207 0.12207;12.207 12.207 12.207 12.207 12.207 12.207;-12.207 -12.207 -12.207 -12.207 -12.207 -12.207;12.207 12.207 12.207 12.207 12.207 12.207];

c=ca.*k;

actualdata=c*data';

subplot(6,1,1);plot(actualdata(1,:));

title('GRF & GRM');xlabel('frames');ylabel('force(N)');

subplot(6,1,2);plot(actualdata(2,:));

xlabel('frames');ylabel('force(N)');

subplot(6,1,3);plot(actualdata(3,:));

xlabel('frames');ylabel('force(N)');

subplot(6,1,4);plot(actualdata(4,:));

xlabel('frames');ylabel('Moment(Nm)');

subplot(6,1,5);plot(actualdata(5,:));

xlabel('frames');ylabel('Moment(Nm)');

subplot(6,1,6);plot(actualdata(6,:));

xlabel('frames');ylabel('Moment(Nm)');

delete(AI)

clear AI