Labview use with Arduino and Olimex Shield Ekg-Emg

[SimoCap]

Hi,

I began using Labview recenly and now I am using it for the acquisition of a real time ecg/emg signal using the Arduino Uno R3 and the shield Olimex with 3 electrodes. I haven't been able to visualize the signal and I don't know if the problem is in the arduino's sketch or in the Labview panel. 
Can anyone help me? Thanks!