Domino reports wrong Content-Length on Get

Trying to speed up downloads from Domino server. Thought I would use a download manager but this did not work as Domino is reporting the wrong size of a file.

Any ideas. For instance a 16MB file came out as this:

23:59:29 30/10/2008 Starting download…

23:59:29 30/10/2008 GET /qkrconn.exe HTTP/1.1

Referer: https://www.ourdomain.net/

Host: www.ourdomain.net

23:59:30 30/10/2008 HTTP/1.1 200 OK

Server: Lotus-Domino

Date: Thu, 30 Oct 2008 23:53:24 GMT

Expires: Tue, 01 Jan 1980 06:00:00 GMT

Content-Type: text/html; charset=UTF-8

Content-Length: 6927

Cache-control: no-cache

What do I need to change?

Many thanks

Ian