I recently upgraded from Atlas CTP to Ajax beta 1.  I beleive that I properly updated my web.config et. al.; however I keep getting this error regarding the UpdatePanel:

Element 'UpdatePanel' is not a known element. This can occur if there is a compilation error in the Web site.
Element 'AsyncPostBackTrigger' is not a known element. This can occur if there is a compilation error in the Web site.
Validation (XHTML 1.0 Transitional): Element 'Triggers' is not supported.
Validation (XHTML 1.0 Transitional): Element 'ContentTemplate' is not supported.

I can drag the UpdatePanel from the IDE toolbox onto the page, but the Intellisense doesn't work and it causes errors.

On a related note, none of my WebParts stuff is recognized either:

Element 'WebPartManager' is not a known element. This can occur if there is a compilation error in the Web site.
'WebPartZone' is not a known element. This can occur if there is a compilation error in the Web site.

Anyone know what is causing this, and how I can fix?

TIA

hello.

hum...have you changed the web.config entries on the page section?

I've got the same problem.  My web.confg page section looks like this:

<system.web><pages><controls>

<add tagPrefix="asp" namespace="Microsoft.Web.UI" assembly="Microsoft.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>

<add tagPrefix="asp" namespace="Microsoft.Web.UI.Controls" assembly="Microsoft.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>

<add namespace="Microsoft.Web.Preview.UI" assembly="Microsoft.Web.Preview" tagPrefix="atlas"/>

<add namespace="Microsoft.Web.Preview.UI.Controls" assembly="Microsoft.Web.Preview" tagPrefix="atlas"/>

</controls>

I should be using <asp:UpdatePanel...> NOT<atlas:UpdatePanel...> correct?  The only items showing up w/ intellisense are <atlas:AutoCompleteExtender>, <atlas:DragOverlayExtender>, <atlas:ProfileService>, <atlas:Script>, <atlas:TimerControl>, and <atlas:UpdateProgress>.

I'm also a bit lost with what I should have in my toolbox after the migration and adding in the value-add controls.  Currently, I still have the ATLAS controls in my toolbox, same as I did from before the migration.  Should I have removed these?  I also removed the .dll's from my BIN directory before the migration (before the installs) and then added back both "AjaxControlToolkit.dll" and "Microsoft.Web.Preview.dll" after the BETA+ValueAdd+Toolkit installs.

Please help, I am LOST!  Thanks!!

 --c--

Thanks Jody, that did it!!

 Someone should consider updating the Migration Guide document.  Step #3 specifically says to use "asp" for the tag.  After I had already renamed all my <atlas> tags to <asp> I had to go back and put them back :( ....what a pain.

Thanks again!

Thanks Jodi. That helped me a lot. Just a note here. Change the tag prefix in web.config file pages section as well as in the html design file.

 Shaun

I have the same error with the installation of AJAX 1.0, without any beta version installed , and the solution was the same, I changed the tags in the web config and in the html and the problem was solved.

Hi,
I don't know to wich categories this belongs but SmartNavigation="true" seems to cause also a “Sys.WebForms.PageRequestManagerParserErrorException” also.

Just some tip if you looking for hours just as I did ;)

Grtz

I've heard that you do not use SmartNavigation with AJAX (or even VS2005)