CCK shows up only in administer -> modules and not anywhere else--how to get it to work?

I wanted to try out CCK, but since I read it's 4.7 only, I set up a separate test site running Drupal CVS. I downloaded the latest CVS version of CCK, unpacked it and installed it following the instructions. Logged in as administrator (and user/1), I activated the content.module and all the various content types (text etc.). Checking in the database showed that the MySQL database was actually updated with the right schemas specified in the various .install files.

However, I noticed at once something was wrong because there was no administer -> content -> content types link in the navigation menu. I thought it might have mistakenly ended up as a disabled menu item, so I looked under administer -> menus, but there was no relative link anywhere.

I then thought it might be a permission error, so I went to administer -> access control and found out there was no administer content types entry, while reading the content.module source leads me to believe there should be.

I read further the the content.module source and realized that the module defined these urls to administer the various content types:
admin/node/types/
admin/node/types/delete
admin/node/types/add_field etc.
so I tried accessing them manually: they seem not to exist at all, they just send me back to admin/node.

As last attempt I switched themes repeatedly (from friendselectric to pushbutton to bluemarine), but there was no change at all, so I guess it's not a weird theme-related problem.

What did I do wrong? Why does CCK show up only under administer -> modules and nowhere else?

It seemed to me I followed the instructions to the letter, but since I read on the forums there are people who at least manage to see the various cck administration pages, I guess I must have missed something. Could anybody help, please?