A client's site of mine has only its home page indexed by Yahoo.

The site is in the Yahoo Paid Directory.

Yahoo site explorer is recording numerous back links.

Our robots.txt file is not disallowing anything. We do not have any noindex or nofollow meta tags on the site.

The sites home page has been index by Yahoo for about 6 months.

Any ideas why Yahoo has only indexed the homepage and not other pages?

Any ideas on how to fix this? I am baffled.