Java stored procedure call error: ORA-06576

I'm a new to ORACLE DBMS.
Now, I'm trying to user java stored procedure.

According to Oracle document, I followed the java call sp procedure. But there error happend.. always....

ORA-06576: not a valid function or procedure name

Please Help me ........

PS.

To replay.....

1. vi Oscar.java public class Oscar { // return a quotation from Oscar Wilde public static String quote() { return "I can resist everything except temptation."; } }
2. javac Oscar.java 3 loadjava -verbose -u scott/tiger Oscar.class
3. sqlplus scott/tiger
4. SQL>CREATE or replace FUNCTION oscar_quote RETURN VARCHAR2 AS LANGUAGE JAVA NAME 'Oscar.quote() return java.lang.String'; 5 SQL> call oscar_quote()

error happened. Received on Tue Nov 21 2006 - 00:56:30 CST