Installing Ajax Control Toolkit Controls Don't Show Up After Adding To Toolbox

I am having trouble installing Ajax Control Toolkit.  Here's the scenario:
I have visual studio 2008 installed and am trying to add the ajax control toolkit.

I followed the following instructions from the website:

Configure Visual Studio 2005 and Visual Web Developer

1.  Create a new web site from the ASP.NET AJAX web site template by opening the "File" menu, clicking "New", "Web Site...", and picking "ASP.NET AJAX Web Site" under "My Templates"
(I just choose website since it's framework 3.5)

2.  Right-click on the Toolbox and select "Add Tab", and add a tab called "AJAX Control Toolkit"

3.  Inside that tab, right-click on the Toolbox and select "Choose Items..."

4.  When the "Choose Toolbox Items" dialog appears, click the "Browse..." button. Navigate to the folder where you installed the ASP.NET AJAX Control Toolkit package. You will find a folder called "SampleWebSite", and under that another folder called "bin". Inside that folder, select "AjaxControlToolkit.dll" and click OK. Click OK again to close the Choose Items Dialog.
--my path is c:\program files\ajax control toolkit\sample website\bin)

When I click ok it returns to the Choose Toolbox Items Dialog and all of the Ajax Controls are listed and checked (i.e. Accordian, ListSearchExtender, etc.).  When I click OK none of the controls show up in the new tab Ajax Control Toolkit.  In fact they don't show up anywhere in the toolbox.  If I restart Visual Studio the new tab Ajax Control Toolkit is gone.  If I right click on the toolbox and try to recreate it it tells me it already exists.  So then I right click reset the toolbox and try again.  

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Bob LearnedCommented:
Did you download and install the correct version for the AJAX control toolkit?  There are two different versions for 2005 and 2008.
mdrapizaAuthor Commented:
Yes I downloaded the corrrect one
Bob LearnedCommented:
I was just wondering because of the title, "Configure Visual Studio 2005 and Visual Web Developer".

Are you using VWD 2008?
I'm having this exact problem too,using Visual Web Developer.  Anybody figure out a solution?
I figured out the solution:

1)  In the Solutions Explorer, right-click on the project and select Property Pages
2)  Set the Target Famework to 3.5

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