JDeveloper, Java & XML :: PLS-00201 Error Displayed When Call Function From Program?

my java program i am executing a pl/sql function using callable statement i checked everything in the function and the function is created without compilation errors in sql*plus environment, and i gave all DBA permissions to the user, but i got the error like below

java.sql.SQLException: ORA-06550: line 1, column 28: PLS-00201: identifier 'NAME' must be declared ORA-06550: line 1, column 7: PL/SQL: Statement ignored

and i wrote the function like below for the below table

create table student(regno number(6),name varchar2(15),dob date,phone number(10),
address varchar2(30),cat varchar2(2),password varchar2(12),hallno number(6),
fee_paid varchar2(3),constraint student_pk primary key(regno))
create table fee(regno number(6), branch varchar2(15),amount number(4), ddno number(12), fee_paid varchar2(3),
dddate date, dd_received_date date default sysdate, constraint fee_pk primary key(regno))

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and the java program is like below
try{
Class.forName("oracle.jdbc.driver.OracleDriver");
Connection connection=DriverManager.getConnection(dbURL,dbUserName,dbPassword);
CallableStatement st=connection.prepareCall("{?=call

[code]...