How many media items are there in Elements album when you select the album in left panel? Could you signin to www.adoberevel.com and check if you see any media in that album from "Albums" tab? Also do you have more new media marked for upload from Elements apart from this album. If yes, whatisthe status of those media on adoberevel.com? If the media is also not there on adoberevel.com, please try the following steps:
1. In Elements, go to Edit>Preferences>Adobe Revel>Turn OFF Revel agent>CLick OK.
2. Go back to Adobe Revel preferences and turn ON revel agent again.
3. Let upload happen and re-check.