I have been using IE6 with my OCD created website for ages and i thought i would try IE7

I set up OCD to include a PLAY link for each track that links to the actual file stored on my server via a mapped drive on the local machine.

This all worked fine with IE6 but with IE7 when i right click on the play link and try to save the file I get a message that says "Your current security settings do not allow this file to be downloaded"

Anyone got any ideas what setting in IE7 needs to be changed to correct this?