YOu are using the CW Special Edition, and the SMAC code has a "SE" version which uses the SMAC code in library frm with no debug information. You should however be able to debug the example applications, eg RangeDemo and WireLessUART.
If you still see no code in the source window, check in the Project Settings dialog that the project is built to include debug information. Another way to check is to chck to see if there is a dot in the Debug column in the Project Explorer pane - the column has a little bug (insect) icon at the top. You can toggle on and off debug information that way.
