"Unsupported feature" Exception in registerIndexTableOutParameter() of Oracle 8.1.7

Hi,

I have a stored procedure
CREATE OR REPLACE PACKAGE TMP1 IS

TYPE PROJECT_ID_TYP2 IS TABLE OF PROJECT.PROJECT_ID%TYPE INDEX BY BINARY_INTEGER;

PROCEDURE SP_TEMP(V_EMP_NBR IN EMPLOYEE.EMPLOYEE_NBR%TYPE,
V_TIME_PERIOD_ID IN TIME_PERIOD.TIME_PERIOD_ID%TYPE, TS_PROJECT_ID OUT PROJECT_ID_TYP2);

End;
....
PROJECT.PROJECT_ID type is NUMBER.

In Java, i have written like this...
int maxTablLen=100;
int eleMaxLen=100;

cstmt3.setInt(1,iEmpNo);
cstmt3.setInt(2,iTimePeriod);
cstmt3.registerIndexTableOutParameter(3, maxTablLen, OracleTypes.NUMERIC, eleMaxLen);
cstmt3.execute();

while running this java file, i got "java.sql.SQLException: Unsupported feature" in cstmt3.registerIndexTableOutParameter() line.

My oracle version is 8.1.7

Anybody can help me to solve this problem?.

Thanks in anticipation,
Joseph Leo