Tools->Page Options - Authoring tab
Tick the CSS 1.0 and CSS 2.0 boxes.
Set the Browsers to custom
Set Schema version to Internet Explorer 5.0
Click OK
Tools->Page Options - Authoring tab
Tick the CSS 1.0 and CSS 2.0 boxes.
Set the Browsers to custom
Set Schema version to Internet Explorer 5.0
Click OK