Wordpress RSS help

[HippySunshine]

No matter what RSS url I enter to find my feed oit doesn't work and comes up with the following error.

XML Parsing Error: XML or text declaration not at start of entity
Location: Hippy Sunshine // Inspirational Blog

<?xml version="1.0" encoding="UTF-8"?>
^

I am using custom permalinks on wordpress and tring all the URLS I can.
I'm guessing something is wrong with my code but where? Would this be in my main index file? CSS? What?