Blog Engine 3.1 does not serve .gif files

Topics: ASP.NET 2.0
Nov 19, 2014 at 2:25 PM
i added static content but IIS still doesnt serve .gif files. my staticcontent list:

<staticContent>
<clientCache cacheControlMode="UseMaxAge" cacheControlMaxAge="365.00:00:00" cacheControlCustom="public" />
  <remove fileExtension=".ico" />
  <mimeMap fileExtension=".ico" mimeType="image/x-icon" />
  <remove fileExtension=".woff" />
  <mimeMap fileExtension=".woff" mimeType="font/x-woff" />
  <remove fileExtension=".mp4" />
  <mimeMap fileExtension=".mp4" mimeType="video/mp4" />
    <remove fileExtension=".gif" />
  <mimeMap fileExtension=".gif" mimeType="image/gif" />
</staticContent>
How can i solve this

screenshot is here:
Image