IE7 Security Settings

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?

Have you tried using Mozilla Firefox ?

Well yes that is a solution but I cant dictate what others may use to view the site so I need to have it work with as wide a selection of browsers as possible.

Watever your feelings about good old microsoft it is a sad fact that the majority of visiters to all my websites are using Internet explorer!