SOAP API Rendering In HTML4.0 Format With Toggle Items

I have been combing the Internet trying to find a way to use the SOAP API
(ReportExecution2005) web service to render a report to HTML4.0 format with
toggle items. From what I have read, the new web services should provide
ASP.NET server-side postbacks from the toggle item images, but so far I have
seen only the same behavior as was in RS 2000, which was that the toggle item
images pointed back to the ReportServer address. The following is the device
info settings that i have used to get the images to show up on the aspx page:

<DeviceInfo><StreamRoot></StreamRoot><Toolbar>False</Toolbar>
<Parameters>False</Parameters>
<HTMLFragment>False</HTMLFragment>
StyleStream>False</StyleStream>
<Section>0</Section>
DeviceInfo>

If I switch the HTMFragment to True I don't get any toggle item images to
render on the page but the report still shows up, and when I actually set the
StreamRoot paramter to something like this
"http://[server]/[virtualdirectory]/GetImage.aspx?reportpath=[path]&streamid=" to render the toggle item images, I get a http 400 : Bad Request error page.

Can someone please provide some information or sample code on how to render
an HTML4.0 report using the SQL 2005 Reporting Services web service and
getting the toggle item images to render as well as work correctly.

Thanks,

Brian