use of RESOURCE TBUF32 r_sms_server_session { buf=qtn_sms_server_session; }

Hi,
I wanted to trace through my code by printing strings at some points.

in xxx.rss file
----------------

RESOURCE TBUF32 r_sms_server_session { buf=qtn_sms_server_session; }
RESOURCE TBUF32 r_sms_server_session_error { buf=qtn_sms_server_session_error; }

in xxx.rls file
-----------------
#define qtn_sms_server_session "sms_server_session"

#define qtn_sms_server_session_error "sms_server_session_error"

in xxxSmsHandler.cpp file
--------------------------
HBufC* textResource1 = StringLoader::LoadLC( R_SERVER_SESSION);
CAknInformationNote* informationNote;

informationNote = new ( ELeave ) CAknInformationNote;

// Show the information Note with
// textResource loaded with StringLoader.
informationNote->ExecuteLD( *textResource1);

// Pop HBuf from CleanUpStack and Destroy it.
CleanupStack::PopAndDestroy( textResource1 );

and I get errror
-----------------

undefined identifier 'R_SERVER_SESSION'