Can anyone else verify that the Hello example fails to output to the serial#1 window when the reg515a.h is included. Single stepping through the program I can see the characters being written to SBUF but nothing is displayed in serial#1. Just by replacing the statement "#include <reg515a.h>" with say "#include <reg552.h>" the program works just fine.
Do you know if it was a corruption in your file, or was there an error which Keil have fixed in the latest version?