If I run the code in example 4-14: Using the callback feature to populate a random value to a web page (exactly as downloaded) in Visual Web Developer 2005 Express Edition, everything works fine.

If, however, I run the code with IIS (XP Professional) -- same files, same directory location -- I get the error:

   Line 70
   Char 1
   Error object expected
   Code: 0

If I try in Firefox, I get:

   WebForm _InitCallback is not defined (line 68)

I suspect it has something to do with the WebResources.axd?

If I point IE to:

http://localhost:2317/RandomNumber/W...44679945312500

things work and javascript is displayed (I assume port 2317 is the build-in Web developer server),

if I point IE to:

http://localhost/RandomNumber/WebRes...44679945312500

I get a page cannot be found by IIS.

Any help/suggestions on what needs to be done to get it working in IIS would be greatly appreciated.

Thanks

Problem found!

After a long weekend of debugging I found the problem:

When ASP.Net 2.0 was installed (via Windows Update), it did not put an entry for the .axd file type in IIS under directory, configuration, mappings.

Actually I had discovered this days ago and put in the entry by duplicating the entry for .aspx -- that didn't work so I went off on another long debugging tangent with the web.config file, which eventually led me back to the IIS entry for .axd -- the critical problem was the "Check that file exists" box must not be checked (obviously -- once I think about it).

Anyway once the entry:

.axd

c:\windows\microsoft.net\framework\v2.0.50727\aspn et_isapi.dll

limit to: GET, HEAD, POST, TRACE

Script Engine

was added to the IIS configuration, everything started to work.

Microsoft owes me another lost weekend!