as external for occi method call

Hi
I created a procedure in occi - need to call it from pl/sql procedure. The method is mapped like this.
create or replace procedure test(num IN OUT number)

        AS EXTERNAL
        LIBRARY MWXXMLLIB
        NAME "test"
        LANGUAGE c
        PARAMETERS
                (num );

Firstly the language needs to be C++ - does this make a difference - what is the correct language keyword for c++?

When I test this function I receive the following error

PL/SQL error mapping function
Unable to load symbol from DLL
at , at .....
Any ideas ?

--
Posted via http://dbforums.com