Source It is a bookmarklet: a little app that runs in your browser and lets you grab bits of the web. Once installed, you can just click it when you are on a web site and capture the RSS feed for the site. Sometimes though, you get an error that a feed could not be found. In a few cases, this will happen even though you can see the RSS feed icon on the site or the site has a link to its RSS feed.
When you first try out MyCurator, some clients find that the Source It and Get It tools display a “404 Not Found” page from their web site. Another case is they display a “500 Internal Server Error” page. In both of these instances, the cause is that the Get It or Source It tools are being blocked from operation by your host installation.