DMA problem when booting from SDCard

Hello,

I have a working code which uses LCD display driven by DMA controller. Everything works fine when I run the code through JTAG. If I boot the code from SDCard then the LCD DMA is not working and I get only blank screen. The rest of the code is executing fine in the background.

I'm not using any GEL files when downloading code using JTAG so that shouldn't make a difference. All the init I do is in the main().

What am I doing wrong?

Here is my init routine for the PLL and peripheral clocks:

void InitSystem(void)
{
#define PLL_CNTL1        *(ioport volatile unsigned *)0x1C20    // PLL Control Register #1
#define PLL_CNTL2        *(ioport volatile unsigned *)0x1C21    //  PLL Control Register #2
#define PLL_CNTL3        *(ioport volatile unsigned *)0x1C22    //  PLL Control Register #3
#define PLL_CNTL4        *(ioport volatile unsigned *)0x1C23    //  PLL Control Register #4

#define USBSCR        	 *(ioport volatile unsigned *)0x1C32    //  USB system control register

	Uint16 i;
// PLL set up from RTC
    // bypass PLL
    *CLK_CONFIG_MSW_ADDR = 0x0;

    PLL_CNTL2 = 0x8000;
    PLL_CNTL4 = 0x0202;
    PLL_CNTL3 = 0x0806;
    PLL_CNTL1 = 0x8E4A;  

    while ( (PLL_CNTL3 & 0x0008) == 0);

    // Switch to PLL clk
    *CLK_CONFIG_MSW_ADDR = 0x1;

// clock gating
    *IDLE_PCGCRL_ADDR = 0x4321;

// power down USB peripherals
	USBSCR = 0x0044;

// reset peripherals
    *PER_RSTCOUNT_ADDR = 0x0020;
    *PER_RESET_ADDR = 0x00BF;
    for (i=0; i< 200; i++);

}