SQL & PL/SQL

Hi,
I'm on 9.2.0.8 and got strange issue with simple test case

on source db:
CREATE OR REPLACE PROCEDURE ADMIN.gg_ref(out_tokens OUT SYS_REFCURSOR) is
  BEGIN
  OPEN out_tokens for select dummy from dual;
END ;
/


Now testing code localy:
SQL> var r refcursor
SQL> declare
  2   output sys_refcursor;
  3  begin
  4   adminx.gg_ref(output);
  5  :r:=output;
  6  end;
  7  /

PL/SQL procedure successfully completed.

SQL> print r

D
-
X


So its working.

I've got db_link to that db , and now call that proc via dblink from other 9.2.0.8 DB:


var r refcursor
  1  declare
  2   output sys_refcursor;
  3  begin
  4   admin.gg_ref@LINK_NAME(output);
  5  :r:=output;
  6* end;
SQL> /
declare
*
ERROR at line 1:
ORA-00604: error occurred at recursive SQL level 1
ORA-00900: invalid SQL statement

Whats wrong with my code ?
Are there any restriction I'm not aware of ?
Regards
GregG