Three Change iTunes Description?

All:
We lost our web guy and need to update our podcast description on iTunes. The issue here is that we originally used Blubrry/Powerpress hosting and then changed it over to Libsyn. We still use the Blubrry plug-in on WP, and I’ve changed the Powerpress “Podcast Channels” default channel description, which is what it says to do, but the old description persists despite having been changed in the settings. It’s been like this for sometime, only recently I’ve gotten around to changing it, so it’s not the “iTunes sometimes takes several weeks to update”.

Thanks!