problem in serial communication with Matlab

Hi,

I am using matlab to read data from nexys2 board. Actually I am sending the range sensor data from nexys board to matlab through serial communication using the command below.

nexys = serial('COM1', 'BaudRate', 9600, 'Parity', 'odd', 'Terminator', '', 'Timeout', 1);

Why the matlab is unable to receive data starting with 0's?

Thanks in advance