idHTTP - downloading from localhost problem

i am using this code

var
F: TFileStream;
begin
F := TFileStream.Create('.\tmp\tmp.pdf', fmCreate);
try
HH.Get(URL, F);
finally
F.Free;
end;

when URL is file from Internet, downloading is ok, when i try to
download from local host it stops below 100k. I couldnt find the
reason.
my localhost is  Apache 2.0.48 on winXP. I am using it for testing. I
can download the same file from localhost with flashget or Opera's
download manager, but not with idHTTP.

what may be the problem?