My Entety EJB makes an Exception when i try to insert a row in a table at the MS SQLSERVER.MS SQLSERVER creates the unike PK, which i retrieve, after the INSERT(?,?) of the other 2 values..

anyone know why ?

code:
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public Integer ejbCreate (String name, String active) throws CreateException {
Connection connection = null;
PreparedStatement stmt = null;
ResultSet rset = null;
int pk = -1;
String query = "INSERT INTO UNIT(name,active) VALUES (?,?)";
try {
//STEP1 : open the connection
connection = this.getConnection();
stmt = connection.prepareStatement(query);
stmt.setString(1, name);
stmt.setString(2, active);
//STEP 2: Obtain the desired resultset with a query
stmt.executeUpdate();
query = "SELECT @@IDENTITY";
stmt = connection.prepareStatement(query);
rset = stmt.executeQuery();
//GET THE PK-VALUE
rset.next();
pk = rset.getInt(1);
} //try
catch (SQLException e) {
e.printStackTrace();
throw new CreateException(e.getMessage());
} //catch
catch (NamingException e) {
e.printStackTrace();
throw new CreateException(e.getMessage());
} //catch
finally {
// Cleanup that needs to occur whether we leave via a return or exception
try {
if (stmt != null) {
stmt.close();
stmt = null;
} //if
if (connection != null) {
connection.close();
connection = null;
} //if

} //try
catch (Exception e) {
e.printStackTrace();
} //catch
//INSERTING THE PK-VALUE IN THE ENTITY EJB
this.setUnitnr(new Integer(pk));
return new Integer(pk);
} //finally
} // ejbCreate