How to trust a TiddlyWiki file on the Vista PC in IE8

browserinternet-explorer-8Securitytiddlywikitrust

Every time I open my tiddlywiki.html file in IE8, I get a warning bar:

To help protect your security, Internet Explorer has restricted this webpage from running scripts or ActiveX controls that could access your computer. Click here for options.

and tiddlywiki doesn't display. If I select "Allow Blocked Content…" it's all fine.

I want to change whatever IE8 settings necessary so that I don't have to do this. Anyone know what setting that would be?

I tried adding my c:\users\me\tiddlywiki.html file to the "Trusted Sites" in IE->Tools->Options->Security but it says the URL doesn't match some regular expression validation.

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