The indexing doesn't happen instantaneously, you may need to give a little time for the yahoo spiders to crawl your site and index it.
if you are still having problems in a couple of days, you should contact yahoo.
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.