[Tr!p]

I have a question concerning an additional line of CSS code I added post-installation of classifieds. I placed a line of code to make a registration link and "forgot password" link in the header. Added some CSS within the additional CSS box and placed the html code into the header. Fairly simple...aside from this appearing as it should everywhere except classifeds. It will show but it reverts to just the string of html without any CSS IE: font type, colour, size etc.
Now, I should mention this issue in not browser specific. It happens in FF as well as IE and happens in reviewpost as well. I attached a couple of screenies just in case I didn't explain this issue well enough. The second attachment shows with the css. As you can see it ignores the CSS because the font and color appear to rendering to default. I have tons of additional CSS coding, (footer, header, etc) and everything displays as it should. The only thing I can see is this was added after the installation, not sure if that matters or not.
Any ideas??