I found the answer to my own problem. While reviewing some questions on the ORACLE web site a similar question was asked.


And the answer is:

In ORACLE the 'execute' is not a command. When in native ORACLE when a user runs a stored procedure with the 'execute procedure_name' command the pre-compiler wraps the procedure_name with a 'BEGIN / END;'.

The result is instead of using the syntax of:
SQLEXEC(gnConnHandle,'execute procedure_name')

USE:
SQLEXEC(gnConnHandle,'BEGIN '+procedure_name+'END;')

It works!!