Why MATLAB does not acquire the right analog signal while LABVIEW does for the same connection?

Please see the simple code below to acquire an analogue sine wave with MATLAB DAQ toobox. I followed exactly many examples on matlab help and online but the acquired signal is not correct. To double check my connections. I used LABVIEW to acquire the same signal it worked perfectly. When I run the code below, MATLAB does acquire a sine wave with an offset of -4.377 V and a low peak to peak voltage. For example. The applied signal is a 100.8Hz sine wave with Vp-p=5.6V. Labview acquires the signal perfectly while MATLAB gives a sine wave signal with a correct frequency (100Hz) but with an offset of -4.377 and a peak to peak voltage of (0.377V)!

Thank you very much for your help!

Best,

mdaghrah

% This programme is to test the functionality of the analog input of the

% mcc PCI-DAS08

clear all

close all

% Step 1: Create object of the Analog Input subsystem

ai = analoginput ('mcc',0);

% Step 2: Create Input Channel

ch1 = addchannel (ai,0);

% Step 3: Configure property values

duration = 1; % 1 second acquisition

set(ai,'SampleRate',2000) % singal frequency is 200 Hz, way below.

ActualRate = get (ai,'SampleRate');

set(ai,'SamplesPerTrigger',duration*ActualRate)

set(ai,'TriggerType','Manual')

ai.ClockSource = 'Internal';

blocksize = get(ai, 'SamplesPerTrigger');

Fs = ActualRate;

% Step 4: Acquire Data

start(ai)

trigger(ai)

wait(ai,duration+1)

[data Time] = getdata(ai);

plot(Time, data);

grid on

% Step 5: Clean up

delete(ai)

clear ai