404s on posts but not pages

I created a page and then I realized I wanted the nice permalink structures everyone else has. So I went the appropriate section in the options for WP 1.5. It told me I needed the .htaccess so I made a blank file and put it in the main directory of my blog. Then CHMODed it to 666. Then I went through the permalink thing again and it updated them. However, my page, “blah”, works in the /wp/blah structure but now all posts that should be /%category%/%post_id% give me 404 pages. I’ve looked at all the other support questions and basically tried them all but they do not work. My site is at: https://www.strawberriz.net/wp/