Pro Drupal v2: annotate module

This is regarding the annotate exemple in Ch 2 from Pro Drupal Dev 2nd edition book.

I downloaded the code from http://www.drupalbook.com/node/2 and copied the following annotate module example codes in /sites/all/modules/custom/annotate/.
annotate.admin.inc
annotate.info
annotate.install
annotate.module

Then, I enabled the Annotate module and tried to create a Page content. But the figure 2-2 does not appear on the page node http://localhost/node/add/page.
what might be wrong?

Mine is Drupal 6.9 running on XP.

Thanks.

[Edit]
Figure 2-2 now appears for Page documents, now db errors.
The following is the error message from http://localhost/admin/reports/dblog.

Table 'drupaltest.annotations' doesn't exist query: SELECT note FROM annotations WHERE nid = 19 AND uid = 1 in C:\xampp\htdocs\sites\all\modules\custom\annotate\annotate.module on line 54.