Reply To: 404 errors with terms.asp?cat=
Hi Miguel,
The problem is google is still looking for the old urls.
When moving a site from one platform to another, the best practice is to use 301 redirect for the old urls(if possible).
Since you have changed the platform to WordPress, I will suggest submitting the google sitemap(there exists some plugin for creating sitemap), that should atleast help in indexing the pages.
I don’t have much experience with SEO, so I hope someone with better understanding of seo guides you here 🙂