Timeout problem in matlab

[xilinx1001]

Hi,

I am trying to read data through serial communication in matlab

I am reading 2 bytes of data

First byte is zero for most of the times and 2nd byte contains information.

I am getting timeout error
Warning: Unsuccessful read: A timeout occurred.

Is there any command to read data starting with zeros

Code:
  nexys = serial('COM1', 'BaudRate', 9600, 'Parity', 'odd', 'Terminator', '', 'Timeout', 1);
  fopen(nexys);
  myNum = 4563;
  %fprintf(nexys, 'd1539'); %Fungerar
  %fprintf(nexys, 'd%4d', myNum); %Fungerar
  for i=1:2
      fprintf(nexys, 's');
      scan_s1 = fscanf(nexys,'%s')-0;
      fprintf(nexys, 't');
      scan_s2 = fscanf(nexys,'%s')-0;
  end

Can anybody suggest something about this

Thanks
xilinx1001