I’m getting a 404 page error?

That’s a simple htaccess/permalink error, it’s a quick fix:

1. Login to your WordPress Admin > find Settings > Permalinks
2. Simply click the Save Changes button (this will flush the rewrite rules)
3. That’s it, you should be all set.

If you’ve already tried the above, we’ll need to take it one step further:

1. Connect to your server via FTP and deleting the .htaccess file (if you’re unsure how to do that, your hosts support can help)
2. Go back to your WordPress Admin > Settings  > Permalinks > Set to Plain > Save Changes > Test the front end of your site
3. Then go back to Permalinks > set to Post Name
4. Save Changes, and you should be all set.

For more information on this problem have a look at this article.