Problem with running STemWin on STM32F103ZET from external SRAM

Hi everyone
I'm using STM32F103ZET to run STemWin532 GUI. In the first step i configured everything for running from internal RAM and program worked fine and GUI displayed components like progress bar and ...., but when i changed linker command file to map GUI memory to external SRAM GUI did not work. I checked connection with SRAM and it was OK. I checked 8,16,32 bit memory accessing integrity by following code:

main()
{


// initial codes 


	uint8_t  static Var8[1000]__attribute__((section(".GUI_RAM")));//.GUI_RAM section is
	uint16_t static Var16[1000]__attribute__((section(".GUI_RAM")));//located at external SRAM
	uint32_t static Var32[1000]__attribute__((section(".GUI_RAM")));


	uint8_t   Read8[1000];
	uint16_t  Read16[1000];
	uint32_t  Read32[1000];






	for(ii=0;ii<1000;ii++)
	{
		Var8[ii]=ii;
		Var16[ii]=ii;
		Var32[ii]=ii;
	}


	for(ii=0;ii<1000;ii++)
	{
		Read8[ii]  = Var8[ii];
		Read16[ii] = Var16[ii];
		Read32[ii] = Var32[ii];
	}


// other codes
}

We can write to External SRAM and read it back successfully.

I attached the STM32CubeIDE Build Analyzer Tool output for memory usage.

In this case (External SRAM) program runs GUI_Init() function successfully and memory allocation and LCD initialization are done, (The LCD is turn to black after GUI_Init() Execution just like when i use the internal RAM as GUI memory) but nothing else happens. Program then execute the following codes in the while(1) loop and screen remains black.

GUI_Init();


  PROGBAR_Handle Progbar0;
  Progbar0 = PROGBAR_Create(20, 80, 360, 80, WM_CF_SHOW);
  PROGBAR_SetFont(Progbar0, &GUI_Font20B_ASCII);
  int val=0;


  while (1)
  {


	  GUI_Delay(50);
	  if(val++>100) val = 0;
	  PROGBAR_SetValue(Progbar0, val);


  }

I placed break point inside the while(1) to making sure that program is running.(Second attached file)

Thanks
Haia.B