Soft 404 Errors

Google is saying that I have soft 404 errors for these 2 URLs:

http://partyhousepong.com/beer-pong-accessories
http://partyhousepong.com/index.php?rou ... ry&path=61

The exact error message from google is:

The target URL does not exist and your server is not returning a 404 (file not found) error.

Your server returns a code other than 404 or 410 for a non-existent page (or redirecting users to another page, such as the homepage, instead of returning a 404). This creates a poor experience for searchers and search engines.

Anyone know how to fix this? Thanks.

open your catalog/controller/product/category.php at the end of the file you will find just before it add

Great thanks, I added that code. The only problem is for the 2 urls that i pasted above, the same page comes up as before. I used a website to check the http status code of these links and got this:

Result code: 503 (ServiceUnavailable / Service Unavailable)

google might still return an error for this. Do you know what it could mean?

Oh wait for http://partyhousepong.com/beer-pong-accessories i'm getting a 404 now. So it's just http://partyhousepong.com/index.php?rou ... ry&path=61 that's returning the 503. Maybe category.php wasn't the file that needed to be edited for this url. Any ideas?

Thanks,
John

both pages are 404 you can check using chrome's developer tools or websites like this http://tools.seobook.com/server-header-checker/

This is interesting because I got a 503, you got a 404, and now I just got a 200. I attached a screenshot of the 200 (OK) status code that was returned using the website you linked me to. What the heck is going on?