WampServer

I had a very large file (455mb) that I had someone on my WAN download off my WAMP installation. I looked over and it was transferring at about 30-40 kbs. I put it under my IIS directory and had the same person download and it went at what I would consider a good speed of 250kbs.

Anyone have any ideas why my Apache/WAMP would have such a slow transfer speed ?