Hey I found a weird temperamental page which randomly gives me the following error
XML Parsing Error: no element found Location: http://kj2011/site_2011/nonprofit-data
The most likely cause for such problem is security, if the problem occurs! check file security and make sure its accessible by asp.net process. (ASP.NET Required Access Control Lists (ACLs)), also does this occur with local calls on the same server?
Another thing is to check your page and make sure you don't have one or more unclosed tags in your markup.