Jennie, thank you so much for your help. After a lot of frustration I just wiped out CW and Freescale MQX, downloaded latest versions of them (even though I knew I had latest version) and reinstalled them. And Wa-Lah! It is working without any issue. So I did not fix anything.
However, based on your comment I had a chance to learn a lot about Cortex M4 and CW. So I want to thank you.
By the way, it is my first time working with RTOS which is a whole new experience for a old timer like me. And I am so excited.