There are quite a lot of things wrong with this code.
First of all, it has two nested web forms (<form>) which does not work.
Secondly, there's an incomplete label (i.e. it starts with <label but is never finished)
Thirdly, there is code on the page that is just plain text (i.e. Label1.Text should be in the code behind, but right now it's just there as plain markup)
Next, Your "code" uses the VB
.NET ampersand (&) character, while your page is using C#. That's not a problem now, but it will be once you move this code to the Code Behind.
Finally, I don't see any Code behind file which is what the exercise is all about. When you double-click the page in Step 5 of the exercise, VWD should open the page's Code Behind for you so you can add the code (the page should have an .aspx.cs extension).
So, all in all, it does't look like the exercise went well. ;- ) Could you try again by following the instructions on page 49 and further to the letter (are you reading the eBook version? You mention page 90, but in the printed copy of the book, this code is on page 49).