Hello Hans;
Thanks for your answer. However, I already have these three steps icluded in my code and my program still does not work when debuging. I am starting to think that it may be a bad configuration of the CCS Project Debug configuration. I have configured my debug session as shown in the two attached images but I still does not enter into the ISR code region. do not know why.
I have tried many options but I don't know where may be the problem. Thanks a lot.