AbleCommerce Shopping Cart Software

I knew I should have bought a computer with XP Pro instead of Vista. So help, please-- I've got to get back to work tomorrow and I've already got enough gray hairs!
I'm trying to set up my test site and am getting errors. I've got a website set up (sort of). I've changed from pipeline mode to classic. ASPNET and Network Service have the right permissions. I've installed Ajax and WSE. I get this error when I try to browse:

HTTP Error 500.19 - Internal Server Error
The requested page cannot be accessed because the related configuration data for the page is invalid.

Module IIS Web Core
Notification BeginRequest
Handler Not yet determined
Error Code 0x80070021
Config Error This configuration section cannot be used at this path. This happens when the section is locked at a parent level. Locking is either by default (overrideModeDefault="Deny"), or set explicitly by a location tag with overrideMode="Deny" or the legacy allowOverride="false".
Config File \\?\F:\Able10863\web.config

I've done what Microsoft said at this location:
http://support.microsoft.com/kb/942055/
Resolution 2
To resolve this problem, use one of the following methods.
Method 1
Do not configure the Web site to use UNC Passthrough authentication to access the remote UNC share. Instead, specify a user account that has the appropriate permissions to access the remote UNC share.
Method 2
Grant the Read permission to the IIS_IUSRS group for the ApplicationHost.config file or for the Web.config file. To do this, follow these steps:
In Windows Explorer, locate the ApplicationHost.config file that is associated with the Web site, or locate the Web.config file that is associated with the Web site.
Right-click the ApplicationHost.config file, or right-click the Web.config file.
Click Properties.
Click the Security tab, and then click Edit.
Click Add.
In the Enter the object names to select box, type computername\IIS_IUSRS, click Check Names, and then click OK.

Note Computername is a placeholder for the computer name.
Click to select the Read check box, and then click OK.
In the ApplicationHost.config Properties dialog box or in the Web.config Properties dialog box, click OK.

It still doesn't work, so I checked Able help to see if there was anything there and there was a section about the 7.1, but the content is garbled:

The 7.0 SR2 version still does not have compatibility with IIS integrated pipelining mode. Are you aware of the need to configure an application pool for Classic ASP.NET mode? The error is not the exact one I see on my Vista install, but I do not have Vista Business. The error is similar to the one I see when I try to use integrated pipeline with older version.

Yes, I had already done that. We ran into that on a Server 2008 so I had found out about it. When I first installed all the software on my computer I had user account control turned off. I ran into a problem with SQL Server Mgmt Studio not installing because I had installed MS Office 2007 first. MS fix for that problem was to delete the 90 folder under SQL Server, but I couldn't delete it with giving even "Everyone" full permissions. So I did a system restore, forgot to turn UAC off again, installed SQL Server first then Office. The weird thing was that I could delete some stuff I hadn't been able to because I got the prompt to give permissions.
So now I tried to be a good girl and turn UAC back on and I can't get into my CoffeCup Lockbox where my passwords are stored.
Just a funny story I wanted to share.
I forced myself to use Vista to work some of these things out because I know it will be good experience.

OK, everything is fixed. I had done things in IIS7 like making sure the application was in classic asp mode and not pipeline mode.
I got an old Able dev site moved over to my new computer and had the same error message with it, but when I tried to open it in Visual Studio, I got a more meaningful message which fixed that site. Error info: I was running VS as administrator, so that wasn't the problem.
Searching for the error in VS help came up with this:
http://msdn.microsoft.com/en-us/library ... S.85).aspx
I'm uploading the info here in case the link goes away. Then I had to make sure the sites were running as applications and everything is working now.

(This post is just so I can have a record of what I did when I forget again. )

One more thing I ran into on someone else's Vista. They were able to open the site if they did it from Visual Studio, but not from IIS. We found out that when IIS was installed on his machine, some of the mappings weren't there for .net.
Here's an image of what we had to add.