Hi Rakesh,
you should not need to check a file. You simply need to be sure ccs can find all the files used in the project. As stated in the wiki, for included files this is in the compilers include options. For linked files this is in the linkers file search path.
However built in examples should work as they are. My recommendation. Clear ccs out and do a full fresh v5.5 installation. Go to Help->Welcome to CCS if you don't have the resource explorer open already and bring in an example using the resource explorer.
Best Regards,
Lisa