Area 51 is a special site where new Stack Exchange sites are proposed. In the definition phase, example questions are proposed and voted on to get a rough idea of what the site will be about when it gets to beta. These example questions stay on Area 51 and are purely for example. They are not answered there and are not migrated to the site when it reaches the beta phase. The questions are still accessible here (unless they've been deleted), but are locked because there purpose as example questions has been fulfilled.
I've taken a look at your Area 51 account and I don't see any questions proposed by you. If you did propose a question, the only reason that it doesn't appear that I can think of is that it has been deleted.
If your question was deleted, the deletion is permanent and only users with enough rep and the community team (Stack Exchange employees) will be able to see it.
On second thought, if you asked the question with an unregistered account, it would not be linked to your registered account in any way. Only mods can merge the accounts back together.
Example questions are sometimes re-asked as a real question in the beta phase, but this doesn't necessarily guarantee that they are on-topic (even if they were un-closed or even up-voted on Area 51).