TM4C1299NCZAD: Can't test USB device eye pattern

We use TM4C1299 with Microchip USB3320 ULPI PHY to achieve USB2.0 device. But when we test USB 2.0 device eye pattern, the test program shows " Operation Failed". It seems the test program EHCI HSETT can find the TM4C1299 USB device(Bulk device). But when we press EXECUTE, it shows "Operation Failed" and we can't get the correct waveform to get USB eye pattern.

Please find below ULPI setting and kind tell us why we can't test USB eye pattern.

ui32SysClock = MAP_SysCtlClockFreqSet((SYSCTL_XTAL_25MHZ |
SYSCTL_OSC_MAIN | SYSCTL_USE_PLL |
SYSCTL_CFG_VCO_480), 60000000);

//
// Configure the device pins.
//
PinoutSet();

//
// Switch the USB ULPI Pins over.
//
USBULPIPinoutSet();

//
// Enable USB ULPI with high speed support.
//
ui32Setting = USBLIB_FEATURE_ULPI_HS;
USBOTGFeatureSet(0, USBLIB_FEATURE_USBULPI, &ui32Setting);

//
// Setting the PLL frequency to zero tells the USB library to use the
// external USB clock.
//
ui32PLLRate = 60 * 1000 * 1000;

//
// Enable the system tick.
//
ROM_SysTickPeriodSet(ui32SysClock / TICKS_PER_SECOND);
ROM_SysTickIntEnable();
ROM_SysTickEnable();

//
// Not configured initially.
//
g_ui32Flags = 0;

//
// Enable the UART that we will be redirecting.
//
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_UART0);

//
//
// Set the USB stack mode to Device mode with VBUS monitoring.
//
USBStackModeSet(0, eUSBModeForceDevice, 0);

//
// Tell the USB library the CPU clock and the PLL frequency. This is a
// new requirement for TM4C129 devices.
//
USBDCDFeatureSet(0, USBLIB_FEATURE_CPUCLK, &ui32SysClock);
USBDCDFeatureSet(0, USBLIB_FEATURE_USBPLL, &ui32PLLRate);

//
// Pass our device information to the USB library and place the device
// on the bus.
//
USBDCDCInit(0, (tUSBDCDCDevice *)&g_sCDCDevice);