Can't read/write to XDATA

Can anyone help us?
When can't get the right informations out of XDATA. We have tried to make a logo on a display, and first we placed all the displaydata in CODE (EPROM), and then the logo looks fine. When we wants to change the data to XDATA, we can see on the pixels in the display that we get the addresses on the displaydata, and not the actual data. The code looks like this:

unsigned char xdata ewjlogo[2560] = { 0xC0, 0xC3, 0xFF, 0xFF,............., 0x54};


void make_window() {
  status_check();
  sending_data(0x00);
  status_check();
  sending_data(0x12);
  status_check();
  set_address_pointer();

    
  for (i=0; i<183; i++) {
	status_check();
    sending_data(ewjlogo[i]);
 // Here we send to the display!!

    status_check();   
    data_write_command();
  }
<pre/>

To my knowledge you never the addrese when you use an array like I do when I send data to the display.

Hope someone can help. JAcob!!!