SSRS output in JPEG format, Multiple Pages to Multiple Images (Files)

http://technet.microsoft.com/en-us/library/dd283101.aspx#RenderingMultiplePages

Hi

As the like above shows " For all other formats, which render as a single page per file, the file name isReportName_Page.ext where. ext is the file extension for the chosen format."

I cant make this work, 

I have added the JPEG option to the config.

<Extension Name="IMAGE (JPEG)" Type="Microsoft.ReportingServices.Rendering.ImageRenderer.ImageRenderer,Microsoft.ReportingServices.ImageRendering">
<OverrideNames>
<Name Language="en-US">Image (JPEG)</Name>
</OverrideNames>
<Configuration>
<DeviceInfo>
<OutputFormat>JPEG</OutputFormat>
</DeviceInfo>
</Configuration>
</Extension>

But I cant get the image files to give me an output like this. 

(new image per page)
SalesReport_1.jpeg
SalesReport_2.jpeg
SalesReport_3.jpeg
...
SalesReport_n.jpeg

any ideas?

-Bjarki

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-Bjarki Már Gunnarsson