Hi, brand-new user here with what must be a most basic question. Searching the forum I've found similar problems, but none exactly the same. Here's what happens:
Using WP 1.5, I can change between Classic and Default themes in the presentation/themes window.
I have located and downloaded a variety of new themes to play with, unzipped them locally and then uploaded them to my web site. I've done this following the instructions in the Codex, using Filezilla and also the file manager FTP in my website's cPanel. I place the themes in wordpress/wp-content/themes, right alongside the Classic and Default theme folders. I seem them there using my file manager. But when I return to the presentation/themes window in which I can change the theme, I see only the original (that is, Classic and Default) theme folders.
I get no error messages, I just can't see the new themes, so I can't select them.
What basic step am I omitting or missing in order to add themes? New user (20 hours or so) impressed so far, but a bit frustrated. Thanks.