[Exim] Problem rewritting

This is a multi-part message in MIME format.
--
[ Picked text/plain from multipart/alternative ]
Howdi all

running exim-4.01

I am trying to use the headers_rewrite = joebloggs@??? bloggs@???

this should rewrite anything to joebloggs@??? to bloggs@???

But it gives me the following

2002-03-08 12:21:52 Exim configuration error in line 432:
transport name missing

does the headers_rewrite option have to be after or before

begin transports

if its before it says

option headers_rewrite unknown


Any Ideas anyone????

Thanks in advance

Chris

--