Hi Jeff,
[quote user="Jeff Ren"]I/O Port = 240[/quote]
This I/O port is usually reserved for the TI XDS510 ISA emulator. Considering that you are using an XDS510 USB based emulator, this sounds wrong. I'm not sure how you are able to connect at all. Did you create this board configuration yourself?
Also provide some more details. Like what exact CCS version you are using. I am guessing it is the older CCSv3 but please confirm. Also what vendor is your emulator from.
Thanks
ki