I don't know how to do that. Please give me a good suggestion.... how can I remove this code or resolve without remove. When I submit my blog in Google feedburner then it's will appear in feedburner box :- The URL does not appear to reference a valid XML file. We encountered the following problem: Error on line 6: The reference to entity "subset" must end with the ';' delimiter When I check my blog in Feed validator (feedvalidator.org) it's will show:-