setting current and volatge for programmble power supply

Hi,

I am trying to setting current and voltage on a programmle power suplly via rs232, using the code below, so I succeded to set the voltage value on the power supply while the current is still zero, pls help

clc

clear all

%s = serial('COM1','BaudRate',9600,'ByteOrder','bigEndian','FlowControl','none','Terminator','','TimeOut',10);% baud

s=serial('COM7','BaudRate', 9600, 'Terminator', 'CR','ByteOrder',...

'BigEndian','InputBufferSize',256,'TimeOut',10);

fopen(s);

%get(s);

% fprintf(s,'*idn?');

% out0 = fscanf(s)

% fprintf(s,':syst:err?');

% out1 = fscanf(s)

fprintf(s,'OUTP:STAT 1');

cc=3;

cmd = num2str(cc,':CHAN1:CURR\b %2.2f;CURR?')

fprintf(s,cmd);

%out2 = fscanf(s)

vv=12;

vmd = num2str(vv,':CHAN1:VOLT\b %2.2f;VOLT?')

fprintf(s,vmd);

%out3 = fscanf(s)

fprintf(s,':CHAN1:MEAS:CURR?');

%out4 = fscanf(s)

fprintf(s,':CHAN1:MEAS:VOLT?');

%out5 = fscanf(s)

%fprintf(s,'OUTP:STAT 0');

fclose (s);

delete (s);