debugging in Sql Developer 1.0.0

I am using Oracle Sql Developer for debugging a simple procedure.

I grant the appropriate privileges:
kims>GRANT DEBUG ANY PROCEDURE, DEBUG CONNECT SESSION TO KIMS;

Grant succeeded.

1. I create a procedure to debug:
CREATE OR REPLACE procedure
dummy_proc(param  varchar2)
as
  v_date varchar2(50);
begin
  dbms_output.PUT_LINE('In dummy_proc ');

  select to_char(sysdate,'dd-mon-rrrr')
  into v_date
  from dual;

  dbms_output.PUT_LINE('date1: '||v_date); <--BreakPoint

  dbms_output.PUT_LINE('date is: '||param); <--BreakPoint
end;

2. I compile the code using compile for Debug tool:

3. I Debug the code:

Debugging Log:
Connecting to the database kims.world.
Executing PL/SQL: ALTER SESSION SET PLSQL_DEBUG=TRUE
Executing PL/SQL: ALTER SESSION SET PLSQL_COMPILER_FLAGS=INTERPRETED
Executing PL/SQL: CALL DBMS_DEBUG_JDWP.CONNECT_TCP( '172.24.197.122', '2281' )
ORA-30683: failure establishing connection to debugger
ORA-12535: TNS:operation timed out
ORA-06512: at "SYS.DBMS_DEBUG_JDWP", line 68
ORA-06512: at line 1
Process exited.

Q1 why am i getting TNS:operation timed out?
 
Q2 I do not see the Pause/Run, Step Into, Step Over, Step out menu options active.
What should i do to get these?