I deactivated some of the plugins and have put back the ones I want but not all. Now I am getting this message:
Your feed filesize is larger than 576K. You need to reduce its size in order for FeedBurner to process it. Tips for controlling feed file size with Blogger can be found in Tech Tips on FeedBurner Forums, our support site.
I tried to look up how to reduce the size of the feed but couldn’t find the answer.