Edit a working XML parser to display different categories -- 2

I have a working XML MagicParser that it's importing a live feed of a certain category and I want to change it to import a different category. It's a very easy job, but I am unable to make it work. Changing the category name doesn't display the wanted category. I have access to the parent website's API to provide the link to the different categories. It's an adult website. I want it to be done via TeamViewer so I can replicate it on my other domains. Thanks