rewrite rule in web.config asp.net

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web.config

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I am implementing outbound rule rewriting for image but its not working. any one can tell me what is problem to execute this.
Web.Config

<system.webServer>
    <rewrite>
      <outboundRules>

        <rule name="CDN_ReWrite_Images" enabled="false" preCondition="IsHtml" stopProcessing="true">
          <match filterByTags="Img, Link, Script" pattern="^(.*)/(Images)/(.*\.(css|js|jpg|jpeg|png|gif|ico|bmp|svg|swf))" />
          <action type="Rewrite" value="http://staging-cdn.dotnetheaven.netdna-cdn.com/{R:2}/{R:3}" />
          <conditions>
          </conditions>
        </rule>

        <preConditions>
          <preCondition name="IsHtml" logicalGrouping="MatchAny">
            <add input="{RESPONSE_CONTENT_TYPE}" pattern="^text/html" />
          </preCondition>
        </preConditions>

      </outboundRules>
    </rewrite>
  </system.webServer>

ASP.Net Page Code:

<div>
        <img src="images/12112015055956AM.png" alt="Twitter" />
        <asp:Image ID="Image1" runat="server" ImageUrl="~/images/12112015055956AM.png" />
    </div>