In Ch07 I uploaded the .aspx control to a new folder called usercontrols and recompiled the BasicWebParts project and put the new dll in the bin.

When I try to drop the control onto a page, the page errors and says:

Request for the permission of type 'Microsoft.SharePoint.Security.SharePointPermissio n, Microsoft.SharePoint.Security, Version=12.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c' failed.

What do I need to do to get the permissions to work?

Let me clarify a little.
I added the CalculatorWrapper webpart to the project.
Rebuilt and dropped in the site's bin.
Then I made a usercontrols directory and dropped the SimpleCalculator.ascx control in the new folder.
That's when I got:
Request for the permission of type 'Microsoft.SharePoint.Security.SharePointPermissio n, Microsoft.SharePoint.Security, Version=12.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c' failed.

Now in the sites web.config I've added:
<SafeControl Src="~/usercontrols/*" IncludeSubFolders="True" Safe="True" AllowRemoteDesigner="True" />
to the safe controls section and changed permission level to WSS_Medium.
Now it just says "Request failed" or "Unexpected Error"

So I changed in the web.config so I can see the trace of the error:
<SafeMode MaxControls="200" CallStack="false"
to
<SafeMode MaxControls="200" CallStack="true"

and

<customErrors mode="On" />
to
<customErrors mode="Off" />

The error is "System.Security.SecurityException Request Failed" or something like that.
It's happening I think when the calcwrapper tries to load the simplecalc.ascx control.

This is so fustrating. I'm moving on to another book.
I've had it with this.