Bundle not working in production

Question

Below is mu code snippet for bundling :

 bundles.Add(new StyleBundle("~/bundles/scent-css").Include(
               "~/css/bootstrap.css",
               "~/css/custom.css"));

in my layout i am addind css file using : @Styles.Render("~/bundles/scent-css")

Everything works fine on my machine , but when i moved all stuff to the local web server (IIS) the css files are not getting loaded. If I view the source of page in production environment I can see line:

<link href="/bundles/scent-css?v=v4ohyWx_1204EYiKV1yo4Pyg03bErnO8heg7POAEXP01" rel="stylesheet"/>

I have googled this and tried almost everything people suggested none of the solution worked so far.

I have tried : -adding bundles.IgnoreList.Clear(); in BundleConfig -Edit the webconfig added :

 <modules runAllManagedModulesForAllRequests="true">
<remove name="BundleModule" />
  <add name="BundleModule" type="System.Web.Optimization.BundleModule" />

Any idea what I am doing wrong here, why the css files are not loading.

Thanks