over-riding the css just for ie (ie.php) is not successful here

i have copied the ie.php file from the views->css folder into the appropriate place in my theme's view folder structure (and confirmed that the view is being used via the developer plugin -> inspect -> views page)..
i have also added a css selector and parameter to the copied ie.php file that i want to only be used in internet explorer.
so far the css selector is not being detected/used by internet explorer 10.
(the setting is a width size parameter for a logo that IE renders a different size to other browsers).

anyone know what i might have missed? i don't use IE much so am not familiar with the pitfalls.

thanks