Hi Sin,
I just went through the process of loading the MQX4.1.1 RTOS, compiling the BSP and PSP, then loading the hello_world example, compile and run successfully on TWR-K60F120M tower hardware (good to check your jumper setting in the following doc: C:\Freescale\Freescale_MQX_4_1_1_GA\doc\MQX_Getting_Started.pdf Section 9.13 TWR-K60F120M.
I tested first with PEMicro USB MultiLink.
Then with the on-board OSJTAG interface. If you are using this interface please ensure the firmware is up-to-date. P&E Microcomputer Systems
Both worked fine for me.
I could run, set breakpoints and see Terminal output of " Hello World ".
Regards,
David