Did you build your desktop site with Yahoo! Site Builder? Here is how you can install the redirect script so mobile visitors will see your mobile website.
1. Login to the Yahoo Web Hosting Control Panel.
2. Click on Create & Update website.
3. Click on the file manager.
4. Click on the yahoo_site_admin folder
5. Click on Cache
6. Click on Pages
7. Edit the index.html file and the home.html file to include the redirect script.
Make sure to remember to place the redirect script directly after the <head> tag and hit save when finished.