I have handler, which have URL like this `/imgrs.axd?w=300&file=2ce5a421-d71a-4dba-9d54-3103058e15b2.jpg`, where

* `w` is width for image
* `file` is filename

Server's answer:

```
Cache-Control   public
Content-Length  9788
Content-Type    image/jpeg
Date    Sun, 05 Jan 2014 10:24:41 GMT
Expires Sun, 12 Jan 2014 10:24:42 GMT
Server  Microsoft-IIS/7.5
X-AspNet-Version    4.0.30319
X-Powered-By    ASP.NET

```

But Google doesn't want to append these images in its index base.
How can I improve accessibility these images for Google?