SQL & PL/SQL :: Alias Used In Start By Connect With Program Gives Error

We have a query which uses start by and connect with method. this query works fine in our earlier version 10. But when we migrated to 11g, we are facing problem with the query.

Scenario 1:
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There is a table in Schema 1 and created a view for the same.

Table : create table alias_test1 ( A varchar2(10),B varchar(10),C varchar2(20),D varchar2(40), E varchar2(10),F number(1));
View: create or replace view alias_vw1
as select A, B,C,D, E,F from alias_test1

Values :
Insert into A.ALIAS_TEST1 (A, B, C, D, E, F)
Values ('Block1', '136', 'TOTBANK', 'Total Bank', ' ', 1);
Insert into A.ALIAS_TEST1 (A, B, C, D, E, F)
Values ('Block2', '136', 'PPRSEGHKB', 'HKB', 'TOTBANK', 2);

Now in the schema B, created a synonym for the view to access. create synonym alias_vw1 for alias_vw1@link.world

Query :
select srl_no,cde,pdesc,lvl,is_leaf,hcy
from( select srl_no,
cde, pdesc, level lvl,
connect_by_isleaf is_leaf,
Ltrim(replace(sys_connect_by_path (rpad(Trim(cde),19,' '),'~'),'~',' ')) hcy
[code]...