I\'ve been successfully using .less files in my dev Cassini server (with dotless) for a few weeks but when I publish to my local IIS server they yield 404 errors. A
.less
Looks like you're missing a mime type on IIS.
For IIS7 add the following to your web.config:
web.config
For IIS6 you can do (presuming you have administrator RDP access):
cscript adsutil.vbs set W3SVC/1/Root/MimeMap ".less, text/css"
Where /1/ is the IIS number of the site.
/1/