Custom Fields No Longer Available for Posts

Please help. I recently upgraded and my custom fields are no longer available for posts. I had a page where n admin i would enter the url of the mp3 file in the custom fields area and choose from the drop down “sermon” when i saved the post it would create a play button on the page to listen to the mp3.
It is a custom developed page that inserts the posts on the same page in a play list layout so you can listen to sermons from the same page with a limit of 10 on the page and the rest sent to archives

Here is the link to the page (hope i can add the url)
http://www.hopelutheranwf.org/weekly-sermons/

Help is greatly appreciated!!!
Mike