File IO problem

[vashwath@rediffmail.com (prashna)]

Hi all,
Pls have a look at the following code

with text_Io;
use text_io;
Procedure FILE_IO_DEMO is
   FILE_I, FILE_O : FILE_TYPE;
   S : STRING(1..80);
   Len : Integer;
begin
   open (FILE_I, IN_FILE,"junk.txt");
   create(FILE_O, OUT_FILE, "output.txt");
   while END_OF_FILE(FILE_I) loop
      GET_LINE(FILE_I, S, Len);
      PUT_LINE(S(1..LEN));
      PUT_LINE(FILE_O,S(1..Len));
   end loop;
end;

The contents of the file junk.txt is
lafeosbv 
qfowep p4gowb
hfwevwpbv

The program is creating output.txt but it contents are nil.

Pls let me know if I am doing wrong.Any help will be appriciated.