problem when sending data from target to host USE RTDX

hj. I have a project with DSP C6416 is "Sending some bytes from target to host"

in Application of Targer (CCS), I use the structure following:

TARGET_INITIALIZE();

void funSWI()
{
  /* data to send to host */
    int status;
    int j;
    int size1;
    int size2;

    /* enable the output channel */
    RTDX_enableOutput( &ochan );

    /* send the data to the host */
    status = RTDX_write( &ochan, &size1, sizeof(size1) );
    status = RTDX_write( &ochan, &size2, sizeof(size2) );
  
    /* check the status of the write operation */
    if ( status == 0 ) {
        puts("ERROR: RTDX_write failed!\n" );
        exit(-1 );
    }
    /* disable the channel after use */
    RTDX_disableOutput( &ochan );
}

-----------------------------------------------------------------------------------------

And in application of Host (VB6.0) , I use the structure following:

Dim rtdx As Object

Dim size1 As integer

Dim size2 As integer

-----------------OutputChannel is opened first--------------------------------------------

Set rtdx = CreateObject("RTDX")

status = rtdx.Open("ochan", "R")

---------------------------------------------------

------------when CCS is being run ,  these following Function start to run---------------------------------------------

status = rtdx.ReadI2(size1)

status = rtdx.ReadI2(size1)

------------------------------------------------

status = rtdx.Close()
Set rtdx = Nothing

--------------------------------------------------------------------------------------------

When I debug in ccs, function RTDX _write() work very good, status = 1

But size1 & size2 in VB is allway =0

Tell me what is wrong??

Anyone help me!!!!!

Thank you very much!