Are the files named with a normal file extension?
I have extension ".less" in this case
1) There is a file style.less in the assets folder.
2) I changed the MMDocumentTypes.xml to treat .less as .css to have code coloring etc
3) I have <link href="style.less" rel="stylesheet/less" type="text/css" /> in head section
Actually, it works like a charm when viewed in Firefox. But in IE the .less file is ignored, and in DW Live View it's ignored (means that all styles in .less file are ignored, both LESS specific and pure css)
Did you ever find the problem causing this as i have the same experience. I know there is a current problem viewing .less using Chrome when the address is a local "file://... " .